JPH0252345B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device that uses a motor to automatically clamp and release a magnetic disk.

Prior Art A device is known that automatically holds and releases a magnetic disk inserted into a magnetic disk device using a mechanism using a motor.

For example, an example thereof is shown in Japanese Utility Model Application Publication No. 57-177265.

This type of device automates the operation of clamping and releasing the magnetic disk, thereby improving operability and centering accuracy of the magnetic disk.

However, since this type of device automatically releases and ejects the magnetic disk, it becomes impossible to release and eject the magnetic disk if the magnetic disk device or its host system fails.

At this time, there is no problem if the magnetic disk is not clamped, but if the magnetic disk fails while it is clamped, the magnetic disk will be left in the device and cannot be removed until the failure is repaired. It ends up.

Purpose The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional magnetic disk. The purpose is to provide equipment.

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

First Embodiment FIGS. 1 and 2 illustrate an embodiment of the present invention. In the figures, reference numeral 1 indicates a chassis of the apparatus, and a front panel 2 is provided at one end of the chassis.

A magnetic disk 3 housed in a quadrilateral case is inserted through the opening 2a of the front panel 2.

On the other hand, the reference numeral 4 denotes a clamp mechanism that clamps the magnetic disk 3. Corresponding to this clamp mechanism, a rotation drive mechanism (not shown) that clamps the magnetic disk 3 and rotationally drives the magnetic disk 3 is provided. The magnetic disk 3 is held between the two and rotated.

Reference numeral 5 denotes a recording/reproducing head mechanism in which a stepping motor 6 moves the track.

A support plate 7 is provided in a part of the chassis 1, and the support plate 7 is provided with a mechanism for automatically clamping, releasing, and ejecting a magnetic disk.

Reference numeral 8 denotes a motor which is a driving source of the mechanism, and a gear 9 is fixed to its output shaft, and this gear 9 meshes with an intermediate gear 10.

A cam disk 11 is rotatably mounted near the intermediate gear 10, and has an uneven cam surface 11a on its upper surface, and a gear 11b that meshes with the intermediate gear 10 on its lower surface. ing.

Further, a protrusion 11c is formed on the outer peripheral surface of the cam disk 11, and a ratchet 11d is further formed partially within a predetermined angular range.

On the other hand, what is indicated by the reference numeral 12 is a rotating lever,
The center portion of the bracket 7a is rotatably supported by a pin 13 on a bracket 7a projecting from the support plate 7.

A roller 12a that contacts the cam surface 11a of the cam disk 11 is provided at one end of the rotating lever 12, and a roller 12b that contacts the upper surface of the free end of the clamp mechanism 4 is provided at the other end.

Reference numeral 14 denotes an ejecting plate, and a spring 15 is stretched between the ejecting plate and the support plate 7, and applies a force to ejecting the magnetic disk to the ejecting plate 14.

This discharge plate 14 works in conjunction with the cam disk 11,
The ejecting operation is stopped by a latch 16 until the timing to eject the magnetic disk 3.

Reference numerals 17 and 18 denote detectors including limit switches, etc. The detector 17 detects the insertion state of the magnetic disk 3, and the detector 18 detects the timing at which the magnetic disk 3 is clamped.

By the way, near the cam disk 11, a shaft 19 that moves along the insertion direction of the magnetic disk 3 is attached to a protrusion 1.
It is attached while being guided by 9a.

A spring receiver 20 is fixed to the shaft 19 at a position on the front panel 2 side, and the protrusion 19a
A spring 21 is loaded between the shaft 1 and
9 is applied with a force in a direction away from the cam disk 11.

Therefore, in the free state, the tip of the shaft 19 cannot engage with the ratchet 11d, and the rear end is in the small hole 2b formed in the front panel 2.

Next, the operation of this embodiment configured as above will be explained.

Before inserting the magnetic disk 3, the roller 12a of the rotary lever 12 is at a lower position on the cam surface 11a, the rotary lever 12 is rotated counterclockwise in FIG. 2, and the clamp mechanism 4 is not attached. Due to the elasticity of the arm, it is moving upward.

Therefore, the magnetic disk 3 can be freely inserted under the clamping mechanism 4.

Insertion of the magnetic disk 3 is detected by the detector 17, and the motor 8 starts rotating.

As a result, the cam disk 11 begins to rotate via the gears 9, 10, and 11b, and the roller 12a rides on the protrusion of the cam surface 11a. As a result, the rotating lever 12 is rotated clockwise in FIG. 2, and the roller 12b presses the clamp mechanism 4 downward. This operation holds the magnetic disk.

As the cam disk 11 continues to rotate and the protrusion 11c is detected by the detector 18, the motor 8 is stopped and the automatic clamping operation of the magnetic disk is completed.

In this state, the magnetic disk is rotated and the head mechanism is driven.

On the other hand, when ejecting the magnetic disk, press the eject switch (not shown) and use that signal to rotate the motor 8 again to rotate the cam disk 11.
Since the roller 12a moves again to the lower part of the cam surface 11a, the other roller 12b is moved to the lower part of the cam surface 11a.
Release the pressure.

At the same time, the latch 16 is actuated by the cam disk 11 at a predetermined timing to release the discharge plate 14.

As a result, the ejection plate 14 is pulled by the spring 15, and the magnetic disk 3 is ejected.

When the magnetic disk 3 is ejected, the signal of the detector 17 is switched, the motor 8 is stopped, and the operation of releasing and ejecting the magnetic disk is completed.

By the way, if the device breaks down while the magnetic disk is being held and it becomes impossible to operate the motor 8, the device must be manually released.

That is, the small hole 2 is opened from the outside of the front panel 2.
When the tip of a ballpoint pen or the like is inserted into b and pushes the shaft 19, the tip of the shaft 19 engages with the ratchet 11d,
The cam disk 11 can be rotated manually.

By repeating this operation several times, the cam disk 11 can be rotated until the timing at which the magnetic disk 3 can be released and ejected, and the magnetic disk can be taken out.

In this way, the members that raise and lower the clamp mechanism can be manually operated from the outside, so in the event of a malfunction of the device, etc.
The magnetic disk can be taken out safely and reliably.

Second Embodiment FIG. 3 explains a second embodiment of the present invention. In each figure, the same parts or corresponding parts as in FIGS. 1 and 2 are given the same reference numerals, and Explanation will be omitted.

In this embodiment, an eccentric cam 22 is provided, and a structure is adopted in which the eccentric cam 22 and the roller 12a are brought into contact to rotate the rotation lever 12.

One end of the shaft 23 of the eccentric cam 22 is fitted into the small hole 2b, and a groove 23a into which the tip of a driver, etc. can be fitted is formed in this part.

Furthermore, a gear 24 is fixed to the other end of the shaft 23, and this gear 24 constitutes a transmission system for power from the motor.

Even if such a structure is adopted, since the eccentric cam 22 can be manually rotated from the outside, the magnetic disk can be manually taken out even in the event of a failure.

Effects As is clear from the above explanation, according to the present invention, a structure is adopted in which the members that raise and lower the clamp mechanism can be operated from the outside, so even in the event of a failure of the device, the magnetic The disk can be ejected.

[Brief explanation of the drawing]

1 and 2 are a plan view and a perspective view illustrating a first embodiment of the present invention, and FIG.
It is a perspective view explaining an example. 2...Front panel, 3...Magnetic disk,
4... Clamp mechanism, 8... Motor, 11... Cam disc, 12... Rotating lever, 14... Discharge plate,
17, 18...detector, 19...shaft, 22...eccentric cam.

Claims (1)

[Claims] 1. In a magnetic disk device that automatically clamps, releases, and ejects a magnetic disk using a motor as a drive source, the cam means that rotates the lever that operates the clamp mechanism that clamps the magnetic disk is operated from the outside. A magnetic disk device characterized in that it is configured to be manually operated.