JPH0325322Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic disk device that converts information using a floppy disk or a similar magnetic disk cartridge. The present invention relates to a magnetic disk device in which a clamp member for fixing the magnetic disk device to a rotary table is prevented from being placed in a clamping position when a disk is not loaded.

[Conventional technology]

For example, a mechanism in which an operating knob is turned to rotate a lever and this lever moves an arm supporting a clamp member to a clamping position is disclosed in Japanese Patent Application Laid-Open No. 1986-
It is disclosed in Publication No. 77800. The device disclosed herein is configured so that when the cartridge is removed from the disk rotating table, the cartridge is picked up with the fingertips and pulled out. Therefore, the operability is not necessarily good. In order to solve this kind of drawback, magnetic tape cassettes or
Similar to the structure for ejecting a microfloppy disk disclosed in Japanese Patent No. 36473, a method may be adopted in which a spring is used to eject the cartridge.

[Problem that the invention attempts to solve]

By the way, if the disk can be clamped even though the cartridge is not loaded, it is not possible to determine whether the cartridge is loaded based only on the position of the clamp operation lever. Furthermore, in order to accurately determine the ready state (ready state) for recording and reproduction, both the cartridge loading detection and the clamping operation detection of the clamp mechanism must be performed separately. Furthermore, in a structure in which a pair of magnetic heads comes into contact with a disk in conjunction with the loading of a cartridge, the pair of magnetic heads collide with each other without the disk intervening, resulting in damage to the magnetic heads. Therefore, there is a need for a magnetic disk device in which the clamp operating lever cannot be operated unless a cartridge is loaded. Therefore, an object of the present invention is to provide a magnetic disk device that can meet the above requirements with a relatively simple configuration.

[Means for solving problems]

To achieve the above object, the present invention will be explained with reference to the reference numerals in the drawings showing the embodiments.The present invention will be described by referring to the reference numerals in the drawings showing the embodiments.
7, which converts information using a rotary table 1 for rotating the disk 2, a motor 3 for rotating the rotary table 1, and fixing the disk 2 to the rotary table 1. a clamping member 5 for performing signal conversion, heads 32 and 33 facing the disk 2 for performing signal conversion, and an operation for operating the clamping member 5 when moving it from the non-clamped position to the clamped position and vice versa. Lever 9 and
A shaft 11 to which the operating lever 9 is fixed and arranged to rotate following the rotational operation of the operating lever 9; a link mechanism 10 for moving from the position to the clamp position, and the operation lever 9 when the cartridge 27 is not inserted.
a sliding member 19 for selectively blocking the clamping operation of the cartridge 27 and ejecting the cartridge 27;
and a spring 31 that applies a biasing force to the sliding body 19 in the direction of ejecting the cartridge 27.
The operation lever 9 is prevented from being clamped when the cartridge is not inserted, and the cartridge 27 is
an engaging member 23 for preventing the sliding body 19 from moving in the inserted state; and a locking mechanism for locking the sliding body 19 at the cartridge insertion position against the biasing force of the spring 31. Equipped with
The sliding body 19 is pressed by the cartridge 27 when the cartridge is inserted, and moves from the first position to the second position.
, and when the operating lever 9 is operated so that the clamp member 5 moves from the clamp position to the non-clamp position, the clamp member 5 returns from the second position to the first position at the same time. The engagement member 23 has a protruding portion 22 formed to eject the cartridge 27 and selectively prevent the clamp member 5 from moving from the non-clamped position to the clamped position. , is fixed to the shaft 11,
When the sliding body 19 is in the first position, it engages with the protruding portion 22 to prevent rotation of the shaft 11, and when the sliding body 19 is in the second position, the shaft 11 is prevented from rotating. an end surface 25 formed to allow rotation and for preventing the sliding body 19 from returning from the second position to the first position when the cartridge is inserted;
The end face 25 is formed so that the sliding body 19 can be moved from the first position to the second position when the operating lever 9 is operated to release the clamp, and the locking mechanism Sliding body 1
9 is pressed by the cartridge 27 and moves from the first position to the second position, the sliding body 12
is configured to be locked in a second position, and to release the lock of the sliding body 12 in response to the clamping operation of the link mechanism 10 in response to the clamping operation of the operating lever 9 when the cartridge is inserted. The present invention relates to a magnetic disk device characterized by the following. In addition, to describe the correspondence between the present invention and the embodiments, the sliding body is the sliding plate 19, and the locking mechanism consists of the protrusion 29, the lock stepped portion 21b of the groove 21, the spring 31, the protrusion 19d, etc.

[Function] In addition to having an ejecting function, the sliding body 19 of the present invention also has a function of selectively blocking the clamping operation of the operating lever 9. The engaging member 23 has the function of preventing the operation lever 9 from being clamped when the cartridge is not inserted, and also has the function of preventing the sliding member 19 from moving in the eject direction. Therefore, with a simple configuration, it is possible to prevent the disk 2 from being clamped in a state where no cartridge is inserted.

〔Example〕

Next, a magnetic disk device according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 shows the entire magnetic disk device, and the second
The figure shows a partial cross section taken along the - line in FIG. In these drawings, reference numeral 1 denotes a rotary table on which a flexible magnetic disk 2 is placed and rotated. 3
is a motor coupled to the rotary table 1. These are housed in a highly rigid first frame 4 made of die-cast aluminum, which can be called a support base or container. 5 is a clamp member;
This is generally called a collet. The tapered protrusion of the clamp member 5 is inserted into the recess of the rotary table 1 through the central hole of the disk 2.
FIG. 2 shows the disc-unclamped position of the clamping member 5. For this reason, disk 2 and turntable 1
The clamp member 5 is spaced apart from. disk 2
When fixing to the rotary table 1, the clamp member 5 is moved onto the rotary table 1 and placed in the clamp position. This clamp member 5 is rotatably attached to a shaft 6, and the shaft 6 is attached to an arm 7. Therefore, the clamping member 5 assumes a clamping position and a non-clamping position corresponding to the position of the support arm 7. The arm 7 is rotatably attached to the frame 4 by a leaf spring hinge 8 as a hinge and biasing device. The leaf spring hinge 8 biases the arm 7 in a clockwise direction in FIG. As a clamp operation mechanism for moving the clamp member 5 via the arm 7, an operation lever 9 and a link mechanism 10 are provided. Link mechanism 1
0 includes a shaft 11 to which the operating lever 9 is fixed at one end, a crank arm 12 fixed to the other end of this shaft 11, a crank pin 13 implanted at the tip of this crank arm 12, and this Lever 1 that follows crank pin 13 and presses arm 7
4. The operating lever 9 and the crank arm 12 extend in a direction perpendicular to the axis 11, the crank pin 13 extends parallel to the axis 11, and the lever 14 extends in a direction perpendicular to the axis 11.
The arm 7 extends in a direction perpendicular to the arm 3, rotates about its one end 14a as a fulcrum, and presses the arm 7 with its other end 14b. One end 14a of the lever 14 is rotatably inserted into an opening 16 provided in the second frame 15, and is configured not to easily separate from the second frame 15. This lever 14 is provided with a long hole 17, as shown in FIG. 3, into which a crank pin 13 is inserted.
The torsion spring 18 provides a biasing force for returning the crank pin 13 to the non-clamped position.

Reference numeral 19 designates an ejector sliding plate related to the present invention, which, like the shaft 11, has a first portion 19a extending in the cartridge insertion direction and a second portion 19b extending in a direction perpendicular thereto. have The first portion 19a is provided with first and second grooves 20 and 21 for guiding it. The second portion 19b is provided with a protruding portion 22 that engages with the clamp operating mechanism. An engaging member 23 is fixed to the shaft 11 in order to selectively establish engagement between the protruding portion 22 and the clamp operating mechanism. The engagement member 23 has a cutout flat surface 24,
As shown in FIG. 9, here the protruding portion 2 of the sliding plate 19
2. Further, the end surface 25 of the engaging member 23 engages with the protruding portion 22 of the sliding plate 19, as shown in FIG. 10, and prevents the sliding plate 19 from moving in the ejection direction. The hook-shaped portion 19c at the tip of the sliding plate 19 is
As shown in FIG. 13, the disk 2 and jacket 26
This is the part that engages with the cartridge 27, which is made up of.

28 and 29 are the first and second protrusions, and the seventh
As shown in the drawings and FIG. 8, it is formed by cutting and raising the second frame 15 made of sheet metal, and is inserted into the first and second grooves 20 and 21. Note that the protrusions 28 and 29 have narrow necks as shown in FIG.
It has a wide head and is engaged with the sliding plate 19 by first inserting the head into the lower wide part of the grooves 20,21. First and second protrusions 2
The necks of 8 and 29 are connected to the first and second grooves 20 and 21.
Since the sliding plate 19 almost coincides with the narrow portions 20a, 21a, when the protrusions 28, 29 are located in the narrow portions 20a, 21a, the sliding plate 19 is located in the narrow portions 20a, 21a.
It is movable only in the cartridge insertion direction in which a and 21a extend. The second groove 21 has a lock stepped portion 21b and a play portion 21c as shown in an enlarged view in FIG.
has. As shown in FIG. 1, a coil spring 31 is disposed between the spring locking piece 30 of the sliding plate 19 and the locking piece 30 of the second frame 15. Since this coil spring 31 is arranged diagonally with respect to the cartridge insertion direction, it applies a downward pulling force to the sliding plate 19 in FIG. 1, and also applies a clockwise force to the sliding plate 19 in FIG. It is given to board 19.

In FIG. 2, 32 and 33 are a pair of magnetic heads, which are supported by a carriage 34 and positioned in the radial direction of the disk 2. Carriage 34
A belt 36 and a pulley 37 shown in FIG. 1, a guide rod 38 shown in FIG. The arm 39 to which the upper head 33 is attached is rotatably supported on the carriage 34 by a leaf spring hinge 40 and biased counterclockwise in FIG. 2 by a torsion spring 41. However, since the protrusion 42 on the arm 39 extends above the clamping arm 7, the upper head 33 does not contact the disk 2 when the clamping arm 7 is in the unclamped position.

The lever 43 shown in FIG. 1 is supported by a shaft 44 and biased by a spring 45 so that a portion 43a is located upward. Therefore, the height position of the cartridge 27 when inserted is limited by the portion 43a of the lever 43, and collision of the cartridge 27 with the lower head 32 is prevented. Since the protrusion 46 of the clamping arm 7 is configured to press the lever 43, the clamping arm 7
When the lever moves to the clamp position, it follows and the lever 43 moves to the clamp position.
The portion 43a also descends, and the disk 2 comes into contact with the head 32.

Switch 4 shown in FIGS. 1, 11, and 12
7 detects the operation of the clamp operating lever 9, and is turned on and off by the engaging member 23. Note that the lever 9 can be operated only when the cartridge 27 is inserted, so the switch 4
7, it is possible to detect both the loading and clamping state of the cartridge 27.

Next, the operation of this magnetic disk device will be explained.

1, 2, 3, and 9 show the state before the disk is loaded. In this state, the sliding plate 19 is in the first position (eject position) shown by the solid line in FIG. I'm getting into it. Therefore, even if you try to turn the clamp operating lever 9 in the clamping direction, the protruding portion 2
It is blocked by 2 and cannot be turned. As a result,
Clamping operation is not possible when the cartridge 27 is not inserted, and the pair of heads 32 and 33 will not accidentally collide without the disk 2 intervening.

When the cartridge 27 is inserted through the slit-like opening 49 of the front plate 48 of the device, one end surface thereof engages with the hook-shaped portion 19c at the tip of the sliding plate 19, and the sliding plate 19 moves against the coil spring 31. The cartridge is moved to the second position (cartridge insertion position) shown by the chain line in FIG. A protrusion 29 is formed on the side wall of the narrow portion 21a of the groove 21.
While engaged, the sliding plate 19 is prevented from rotating, but when the insertion of the cartridge 27 is completed and the sliding plate 19 moves to the position where the protrusion 29 comes out from the narrow portion 21a, The force of the coil spring 31 causes the sliding plate 19 to rotate slightly clockwise in FIG. 1, and the protrusion 29 is positioned within the lock step 21b as shown by the chain line in FIG. Therefore, even if the force pushing the cartridge 27 is released, the sliding plate 19 will not return to its original position due to the force of the coil spring 31. When the sliding plate 19 reaches the second position corresponding to completion of insertion of the cartridge 27, this protruding portion 22
slips out from under the flat surface 24 of the engaging member 23,
As shown in FIG. 10, it is located deeper than the end surface 25 of the engaging member 23. As a result, it becomes possible to turn the clamp operating lever 9 without being blocked by the protruding portion 22. Therefore, the clamp operating lever 9 is moved to the first position.
When turned to the position shown in Figure 0, the shaft 11 will follow this.
and the engaging member 25 also rotates, the lever 14 rotates clockwise in FIG. 3, the clamping arm 7 rotates counterclockwise in FIG. 2 against the leaf spring hinge 8, and the clamp A member 5 fixes the disk 2 on the rotary table 1.

When the lever 14 is rotated in the clockwise direction in FIG.
d, and the sliding plate 19 is displaced counterclockwise in FIG. That is, since the sliding plate 19 is pulled by the coil spring 31 in the direction shown by the arrow 50 in FIG. 4, in a state where the protrusion 29 and the sliding plate 19 are locked, When the sliding plate 19 is pressed as shown by the arrow 51, the first
The sliding plate 19 rotates slightly around the protrusion 28,
The second protrusion 29 comes out of the lock step 21b. As a result, the sliding plate 19 can be freely moved in the longitudinal direction, and the sliding plate 19 is slightly moved downward in FIG. 6 by the force of the coil spring 31. As a result, the relative positional relationship between the second protrusion 29 and the groove 21 is in the unlocked state shown by the dotted line in FIG.
However, the protruding portion 22 of the sliding plate 19 hits the end surface 25 of the engaging member 23 as shown in FIGS. 10 and 12, and the sliding plate 19 is prevented from moving in the eject direction.

When the clamp operation lever 9 is returned from the position shown in FIG. 10 to the position shown in FIG.
Since the movement prevention of is also released, the sliding plate 19 returns from the position indicated by the chain line in FIG. 1 to the position indicated by the solid line by the force of the coil spring 31. At this time, the cartridge 27 is pressed in the eject direction by the hook-shaped portion 19c,
The cartridge 27 protrudes from the front plate 48 by, for example, about 2 cm.

The present invention is not limited to the embodiments described above, but can be modified. For example, instead of diagonally stretching one coil spring 31 to obtain both horizontal and vertical components, two springs may be provided. Further, although the engaging member 25 has the functions of preventing rotation of the clamp operating lever 9 and preventing movement of the sliding plate 19, members having each function independently may be provided independently.

[Effect of idea]

As is clear from the above, the sliding body related to the attachment and detachment of the cartridge, such as the sliding plate 19 of the embodiment,
Since a portion for selectively blocking the clamping operation of the clamp operation mechanism is provided, unnecessary clamping operations can be blocked with a relatively simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a magnetic disk device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 3 shows the clamp operation mechanism of the device in FIG. 4 and 5 are plan views showing the relationship between the sliding plate and the projections. FIG. 6 is a partially cutaway enlarged plan view showing the relationship between the sliding plate and the projections.
8 is a perspective view of the frame having projections, FIGS. 9 and 10 are perspective views showing the relationship between the clamp operating mechanism and the sliding plate, and FIGS. FIG. 12 is a right side view showing the relationship between the sliding plate and the engaging member in FIGS. 9 and 10, and FIG. 13 is a plan view of the cartridge. DESCRIPTION OF SYMBOLS 1... Turntable, 2... Disc, 5... Clamp member, 7... Arm, 9... Operating lever, 10
... Link mechanism, 19 ... Sliding plate, 21 ... Groove,
21a... Narrow portion, 21b... Lock stepped portion, 2
2... Projection portion, 23... Engaging member, 24... Flat surface, 25... End surface, 27... Cartridge.

Claims (1)

[Claims for Utility Model Registration] Information conversion is performed using a magnetic disk cartridge 27 consisting of a flexible magnetic disk 2 and a jacket 26 that accommodates the disk 2, and the disk 2 is rotated. a motor 3 for rotating the rotary table 1; a clamp member 5 for fixing the disk 2 to the rotary table 1; and a clamp member 5 facing the disk 2 for signal conversion. heads 32, 33; an operating lever 9 for operating the clamp member 5 when moving it from the non-clamping position to the clamping position and vice versa; the operating lever 9 is fixed and the operating lever 9 can be rotated; a link mechanism 10 for moving the clamp member 5 from a non-clamp position to a clamp position in response to the rotation of the shaft 11; and a link mechanism 10 for moving the clamp member 5 from a non-clamp position to a clamp position. a sliding body 19 for selectively blocking the clamping operation of the operation lever 9 and ejecting the cartridge 27 when the cartridge 27 is not inserted; a spring 31 that applies the spring 31 to the operating lever 9 when the cartridge is not inserted;
and prevents the clamping operation of the cartridge 2.
an engaging member 23 for preventing the sliding body 19 from moving when the cartridge 7 is inserted; and a locking mechanism for locking the sliding body 19 at the cartridge insertion position against the biasing force of the spring 31. The sliding body 19 is arranged so as to be moved from the first position to the second position by being pressed by the cartridge 27 when the cartridge is inserted, and the clamp member 5 is moved from the clamp position to the non-clamp position. When the operation lever 9 is operated so as to move from the second position to the first position, the cartridge 27 is simultaneously ejected, and the clamp member 5 is moved from the unclamped position to the clamped position. The engaging member 23 has a protruding portion 22 for selectively preventing movement to the first position, and the engaging member 23 is fixed to the shaft 11, and when the sliding body 19 is in the first position. At some point, the shaft 11 is engaged with the protruding portion 22.
is formed to prevent rotation of the shaft 11 when the sliding body 19 is in the second position, and to allow rotation of the shaft 11 when the sliding body 19 is in the cartridge insertion state from the second position It has an end surface 25 for preventing the sliding body 19 from returning to the first position, and the end surface 25 moves the sliding body 19 from the first position to the second position when the operating lever 9 is operated to release the clamp. The lock mechanism is configured to move the slider 12 to the second position when the slider 19 is pressed by the cartridge 27 and moves from the first position to the second position. 2, and the slider 12 is unlocked in response to the clamping operation of the linkage mechanism 10 in response to the clamping operation of the operating lever 9 when a cartridge is inserted. Features of magnetic disk device.