JPS5998361A - Media protecting device of floppy disk drive - Google Patents

Abstract

PURPOSE:To eliminate press-contacting of a media and a block, and to prevent generation of a rotating variation by shunting a clamp block by inserting a magnetic media, and thereafter, turning the block in the direction for separating the block from the media. CONSTITUTION:A clamp block 21 is supported so as to be freely turnable by a supporting shaft 23 of a clamp base 5, energized counterclockwise by a spring 22, and a stopper face 24 and a receiving part 25 are formed on the block 21. When a magnetic media 26 is not installed yet, the stopper face 24 is engaged to a pin 20 of an operating shaft 17, and clamping is obstructed. When the media 26 is inserted, the block 21 turns clockwise and clamping is executed, but in that case, the pin 20 of the operating shaft 17 pushes the receiving part 25, and the block 21 further turns clockwise and is separated from the media 26. Therefore, a contact of the media 26 and the block 21 is eliminated, and generation of a rotating variation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a media protection device for a floppy disk drive that writes data to or reads data from a disk-shaped magnetic medium.

Technical background of the invention and its problems In this type of apparatus, a magnetic medium is connected to a spindle and rotated, and a magnetic head is moved along the radial direction of the magnetic medium. In order to ensure that the magnetic head comes into contact with the magnetic media, a head arm is provided on the carrier that holds the magnetic head so that it can rotate freely and is biased toward the carrier side. The floating from the magnetic head is suppressed. In the case of a double-sided floppy disk, a magnetic head is attached to each of these carriers and head arms. on the other hand,
In order to connect the magnetic medium to the spindle, a clamp arm equipped with a camshaft ramp rotated together with the operating shaft is pressed, thereby pressing the magnetic medium against the clamp system spindle. The clamp arm is formed with a protrusion that prevents the helad arm from moving toward the carrier, and the operation axis is moved by retracting the clamp lock when the magnetic media is installed. When the magnetic head is not attached, the movement of the operating shaft is locked to separate the clamp from the spindle, and this movement causes the head arm to rise from the carrier to prevent direct contact between the magnetic head and the pad or the magnetic head.

This structure is a magnetic head protection device.

However, in order to install the magnetic media, operate the shifter block, remove the magnetic media, and return the clamp lock to the locked position just in case, the clamp lock must be biased with a spring and removed. When the magnetic media is installed, the clamp lock presses the jacket of the magnetic media. Therefore, the magnetic media always rotates under local loads, causing rotational fluctuations and adversely affecting the service life.

Purpose of the Invention The present invention has been made in view of the above points, and provides a magnetic media protection device for a floppy disk drive that can protect magnetic media with an extremely simple structure without adding any parts in a structure for protecting a magnetic head. The purpose is to scale.

Summary of the Invention This invention uses a clamp lock to restrict the rotational movement of the operating shaft when a magnetic medium is not attached, thereby preventing the clamp operation and maintaining the head arm separated from the carrier to prevent the magnetic head from moving. to protect the
When the magnetic media is attached, the shifran block is retracted to a clamping operation permissible position, and when the operating shaft is rotated to perform a clamping operation at this position, the clamp lock is moved to a position away from the magnetic media, and therefore, The magnetic medium is protected by an extremely simple structure without increasing the number of parts, and rotation fluctuations can be prevented.

Embodiments of the Invention An embodiment of the invention will be described with reference to the drawings. (1) is a base, and this base (1) includes a spindle (2) connected to a motor (not shown), a guide shaft (4) that slidably holds a carrier (3), and a clamp base ( 5) is provided. A helad arm (6) is connected to the carrier (3) via a leaf spring (7) so as to be able to rise and fall freely. This head arm (6) has a spring (
8) It is biased toward the carrier (3) side. A magnetic head (9) is fixed to the carrier (3), a pad α0) is fixed to the head arm (6), and an arm portion α9 projecting laterally is integrally formed.

Next, on the clamp base (5), the clamp support plate 0, which rotatably holds the clamp (c) facing the spindle (2), is biased by a spring α4 in a direction away from the spindle (2), and is attached to the spindle (2). It is rotatably mounted around the center of rotation. A support portion αG that supports the arm α force is integrally formed on the clamp support plate (2). A cam 09 is fixed to one end of the operating shaft αη supported by the clamp base (5), and a knob αη is fixed to the other end.
9) is fixed, and a bottle holder, which is a protrusion projecting in the radial direction, is fixed in the middle.

Furthermore, the clamp base (5) has a clamp lock al.
) is urged counterclockwise by a spring (A) and supported around a support shaft (C) as a pivot point. This clamp lock al) is formed with a stopper surface (c) and a receiving portion (c).

In such a configuration, the state shown in FIG. 1 is a state in which no magnetic medium (c) is attached. In this state, the clamp lock 0■ is in a vertical position, and the stopper surface (C) is located within the vertical plane connecting the support shaft (C) and the pin (E). Therefore, even if rotational force is applied to the operating shaft αη, the bottle (
E) is still in contact with the stopper surface (C), and the clamping operation is prevented. As a result, the clamp support plate 0 is separated from the system spindle (2) by the action of the spring α, and the movement of the head arm (6) toward the carrier (3) is prevented by the support part α. That is, the magnetic head (9) and the band αO do not come into contact with each other, and the magnetic head (9) is not scratched or soiled by fine dust attached to the band α0. When a magnetic head (9) is used instead of the pad αQ as in the case of a double-sided floppy disk, the protection of the magnetic head (9) is more effective because interference between the hard magnetic heads (9) is prevented. It is done.

When the magnetic media (C) is inserted into the insertion path □□□ between the base (1) and the clamp base (5), the clamp lock shift is pushed by the magnetic media (C) and springs up as shown in Figure 2. (A) is bent and rotated clockwise, and the stopper surface (C) is retracted from the bottle □□□. As a result, the operating shaft αη is released and rotational movement for the clamping operation is permitted. That is, when the operating shaft αη is rotated, the clamp support plate α9 is pushed by the cam a→, and the support shaft α→
The head arm (6), which is rotated around , presses the magnetic media (c) against the spindle (2) using the clamp (6), and the head arm (6) released from the support part αG is rotated by the force of the spring (8). The pad αQ presses the magnetic medium (c) against the magnetic head (9). At this time, due to the rotational movement of the operating shaft αη, the receiving part (c) receives the force of the bottle handle as shown in Fig. 4, so the clamp lock Q1) further rotates clockwise and the magnetic media C) away from.

Therefore, the magnetic media (c) is not subjected to local loads, and there is no rotational fluctuation, and its lifespan is extended. This effect is achieved by integrally forming the receiving portion (c) on the clamp lock Q), which prevents an increase in the number of parts and makes the structure extremely simple.

Effects of the Invention Since the present invention is configured as described above, the rotational movement of the operating shaft is restricted by the clamp lock, thereby preventing the clamping operation and maintaining the head arm separated from the carrier. By attaching the magnetic media, the shifran block can be retracted to a position that allows clamp operation, and the operating shaft can be operated in this position to clamp the magnetic media to the spindle using the clamp. At this time, the clamp lock can be made to respond to the movement of the operating shaft to lift it off the magnetic medium, which has the effect of preventing fluctuations in the rotation of the magnetic medium and increasing the life of the magnetic head. be.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a side view showing a state in which a magnetic medium is attached, FIG. 3 is a perspective view showing the main parts, and FIG. 4 FIG. 2 is a partial side view showing an enlarged main part. 2... Spindle, 3... Carrier, 6... Head arm, 9... Magnetic head, 10... Pad,
12... Clamp, 13... Clamp support plate, 16
...Support part, 17...Operation shaft, 18...Cam, 2
0... Pin (protrusion), 21... Clamp lock,
23... Support shaft (rotation center of clamp lock), 24...
...Stopper surface, 25...Receiving part, 26...Magnetic media Applicant: Tokyo Electric Co., Ltd.

Claims (1)

[Claims] A clamp support plate is attached to a carrier holding a magnetic head, and a clamp that urges and rotatably connects a head arm holding a magnetic head or a pad toward the carrier side, and presses a magnetic medium against a spindle. is biased in a direction away from the spindle so as to be movable;
A support part is fixedly provided on the clamp support plate to abut on a part of the head arm and separate the head arm from the carrier when the clamp support plate moves away from the spindle, and the clamp support plate is moved away from the spindle. An operating shaft equipped with a cam that presses toward the spindle is rotatably provided, and a protrusion that protrudes in the radial direction is provided on the outer periphery of the operating shaft, and when the magnetic medium is not attached, the rotation fulcrum and the protrusion are connected. A clamp block having a stopper surface that is located in a connecting plane and abuts on the protrusion is provided so as to be rotatable by biasing it in a return direction. A media protection device for a floppy disk drive, characterized in that the clamp lock is integrally formed with a receiving part which receives rotational force from the protruding part when the stopper surface rotates against the protruding part at a position where it is removed from the protruding part. .