JPS6343669Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a protective sheet for a disk device that records or reproduces signals using a flexible magnetic disk cartridge (floppy disk) or a similar disk cartridge, and further relates to In particular, the present invention relates to a sheet for protecting a head carriage, a head moving mechanism, etc.

Conventional problems: Rigid case with a diameter of 86 mm (approximately 3.5 inches)
In magnetic disk devices that record or reproduce signals using magnetic disk cartridges (microfloppy disks) containing magnetic disks, the conversion head must be positioned with an accuracy of several micrometers to several tens of micrometers. . For this reason, it is necessary to prevent the head carriage from moving during transportation and strongly hitting a stopper or the like for determining the range of movement, and from causing misalignment due to this impact. Such head carriage movement prevention can be achieved by using suitable blocking members. but,
A blocking member that can be easily attached and detached and that can reliably achieve blocking has not yet been proposed.

Purpose of the Invention Therefore, an object of the present invention is to provide a protective sheet for a disk device that is easy to attach and detach and has high protection reliability.

Structure of the Invention To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments for ease of understanding. Cartridge 15
and insert the disc 19 of the cartridge 15.
is rotated by a rotating mechanism, and the signal converting heads 4, 5 supported by carriages 6, 7 are moved in the radial direction of the disk 19 by a moving mechanism, so that the heads 4, 5 are placed on desired tracks of the disk. This is for protecting a disk device that is configured to record or reproduce signals by positioning it, and similarly to the cartridge 15, the opening 2
a body part 28 having a portion 31 for insertion into said container 1 through said opening 24 to limit the movement of said carriages 6, 7; a retaining portion 29 extending substantially perpendicularly to 28 and disposed inside the front plate 23;
The present invention relates to a protective sheet characterized in that it has an operating portion 30, at least a portion of which is disposed outside the front plate 23.

Effects of the Invention According to the above-mentioned invention, the protective sheet 22 is prevented from slipping out from the opening 24 because the retaining portion 29 is provided inside the front plate 23.
Therefore, movement of the head carriages 6, 7 can be prevented with high reliability. Further, since the width of the retaining portion 29 is smaller than the width of the opening 24, it is possible to attach and detach using the opening 24, and attachment and detachment can be easily achieved.

Embodiment Next, a magnetic disk device and its protective sheet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.

The magnetic disk device shown in FIGS. 1 and 2 is
It is constructed by accommodating a disk rotation mechanism, a magnetic head, a movement mechanism thereof, etc. in a container 1. The disk rotation mechanism consists of a rotary table 2 and a rotation motor 3, and is configured to rotate the disk by chucking the disk on the rotary table 2 with a magnet (not shown). A pair of magnetic heads 4, 5 are supported by respective carriages 6, 7, and are moved in the radial direction of the disk by a head moving mechanism. The head moving mechanism is composed of a stepping motor 8 and a belt transmission device, and is configured to linearly move the carriages 6 and 7 in the disk radial direction so as to correspond to the rotation angle of the rotor of the stepping motor 8. ing. In this embodiment, the belt transmission device consists of a steel belt 10 wound in an α-shape around a drive wheel 9 connected to a stepping motor 8, with the middle portion fixed to the drive wheel 9 and both ends fixed to the carriage 6. It is structured accordingly. 1
1 is a guide rod that guides the carriage 6 in the disk radial direction; 12 is a stopper;
is a portion that limits the carriages 6, 7 to a position corresponding to the outermost track (zero track) of the disk. Note that the upper carriage 7 is supported by the lower carriage 6 and is biased clockwise by a spring 13, but when the cartridge is not inserted, it is biased by a restriction member (not shown). It is held in the position shown in Figure 2. Reference numeral 14 denotes a cartridge holder, which supports the cartridge 15 shown in FIG. 3 and transports it to the rotary table 2.
Reference numeral 16 in FIG. 1 is a sliding body that controls the vertical movement of the holder 14, and when the cartridge 15 is inserted, both 16a are pressed by the cartridge 15 and slide in the direction shown by the arrow. This actuates a known elevating mechanism (not shown) that lowers the shown holder 14 toward the rotary table 2.

As is clear from FIG. 3, the cartridge 15 houses a magnetic disk 19 having a metal hub 18 in a case 17.
is attracted to the rotary table 2 by a magnet and is configured to be rotated. The head insertion opening 20 is closed by a shutter 21, and the shutter 21 is opened when the cartridge 1 is loaded.

Although not shown, the holder 14 shown in FIG. Following this, the upper carriage 7 rotates clockwise in FIG. 2 and comes into contact with the upper surface of the disk 19.

By the way, if this magnetic disk device is strongly vibrated with no cartridge 15 loaded, the cartridges 6 and 7 may move and strongly hit the outermost disk stopper 12 or the innermost disk stopper (not shown). There is. As a result, the stopper 12, the carriage 6, etc. may be distorted or destroyed, the belt 10 may be elongated, the head moving mechanism may become out of order, and accurate determination of the head position becomes impossible.

Therefore, in this embodiment, a protective sheet 22 is attached as shown in FIG. 2 when the magnetic disk device is transported. That is, in the same manner as for the cartridge 15, the protective sheet 22 is inserted from the cartridge insertion opening 24 of the front plate 23 of the container 1, and the tip of this sheet 22 presses the carriage 6 in the direction of the stopper 12 to prevent the carriage 6 from moving. to prevent In this embodiment, the protective sheet 22 has a special shape, and is devised so that it can be easily attached and detached and yet can be prevented with high reliability. This protective sheet 22
is the front plate 23 of the container 1 shown in FIGS. 4 and 5.
and is formed to fit into the opening 24 thereof. The front plate 23 is provided with a recess 25 for easily attaching and detaching the cartridge 15. The opening end surfaces (upper surfaces) of the deep portion 26 of the recess 25 and the pair of side walls 27 are located somewhat below the opening end surfaces of the other portions.

The protective sheet 22 has a bendable thickness of 0.5~
It is formed from a paperboard with a thickness of about 1 mm, and before being bent, it has the shape shown in FIGS. 1 and 6, and includes a large-area main body portion 28, a pair of strip-shaped retaining portions 29, and a tongue-like protruding operation portion. It consists of a portion 30. The main body portion 28 includes a carriage movement limiting portion 31, a cutout portion 32 for preventing collision with the heads 4 and 5, and a cutout portion 33 for preventing collision with the engagement surface 16a of the sliding body 16. is provided. Reference numerals 34, 35, and 36 are bent portions, which are pressed so that they can be easily bent. A pair of retaining parts 2
9 is separated from the main body portion 28 by a cutout 37 to facilitate bending. but,
It is integrated into the main body part 28 via the operating part 30. The width of this retaining portion 29 is determined to be less than or equal to the width of the opening 24, and the length thereof is determined to be less than the width of the opening 24.
It has been decided that it can be inserted into 4. Operation part 30
consists of first, second, and third portions 38, 39, 40 divided into folded portions 34, 35, 36. Note that the width of this operating portion 30 is the same as that of the front panel 2.
3, and the length of the first portion 38 is determined to be able to be inserted into the recess 25.

Next, a method of using the protective sheet 22 shown in FIG. 6 will be explained. Prior to inserting the protective sheet 22, the carriages 6 and 7 are moved in advance so that the heads 4 and 5 are located on the outermost tracks of the disk 19. Next, the protective sheet 22 is folded as shown in FIG. 7 before or after being inserted into the opening 24. That is, the first and second bent portions 34, 35
Fold each at approximately right angles. Then, the carriage movement restricting portion 31 of the protective sheet 22 is pressed against the support portion 6a of the carriage 6, and the retaining portion 29 is inserted inside the front plate 23 as shown in FIGS. 10 and 11. Such an operation is performed when the width of the retaining portion 29 is less than or equal to the width of the opening 24,
In addition, since the inner part 26 of the recess 25 of the front plate 23 and the end face of the side wall 27 are lower than other parts, this can be done easily. The protective sheet 22 has relatively high rigidity and does not easily deform except for the bent portions 34, 35, and 36, so even if the carriage 6 tries to move rightward in FIG. 2, the protective sheet 22 will prevent it. Also, the protective sheet 22 is attached to the carriage 6.
Even if it is pressed to the right in FIG. 2, it will not move because the retaining portion 29 is in contact with the front plate 23. By arranging the retaining portion 29 as shown in FIGS. 10 and 11, the protective sheet 22 is almost completely prevented from coming off in the right direction in FIG. 11. However, in FIG. 11, prevention of upward removal has not been achieved.

Therefore, in this embodiment, the third
The bent portion 36 of the operating portion 30 is bent as shown in FIG. 8, further bent as shown in FIG. 9, and the tip of the third portion 40 of the operating portion 30 is inserted into the opening 24 as shown in FIG. . Since each of the bent portions 34, 35, and 36 of the operating portion 30 is deformed to have elasticity, it has a force that tends to return to the original state shown in FIG. Therefore, the third portion 40
hits the edge of the opening 24 or the interior of the container 1, such as the printed circuit board 41 or the lid, and is in a state where it cannot be easily removed from the opening 24. Also, the first part 3
8 and the retaining portion 29 are pushed downward in FIG. As a result, the protective sheet 22 will not come off due to vibrations or the like during transportation.

When removing the protective sheet 22 from the disk device, it is necessary to perform the operation in the opposite direction to that used when attaching the protective sheet 22.

As is clear from the above, according to this embodiment, the movement of the carriages 6 and 7 can be prevented very easily. Furthermore, since it is not necessary to fix the protective sheet 22 to the container 1 with adhesive tape or the like, it is not only easy to attach and detach the protective sheet 22;
There is no risk of staining the container 1 with adhesive.

Modifications The present invention is not limited to the embodiments described above, but can be modified. For example, if there is no risk that the protective sheet 22 will come into contact with the heads 4 and 5, the protective sheet 22 may be interposed between the heads 4 and 5 without providing the notch 32, and the protective sheet 22 may be placed between the heads 4 and 5. Collision between 4 and 5 may be prevented.

Alternatively, the notch 37 may be omitted and the retaining portion 29 may be formed as shown in FIG. 12. In addition, if the front plate 23 does not have the recess 25 and the stepped portion of the opening 24, a notch 42 is provided between the retaining portion 29 and the first portion 38 as shown in FIG. The stop portion 29 may be placed inside the front plate 23 and the first portion 38 may be placed outside the front plate 23.

Furthermore, an engagement wall that determines the rotating range of the rotor of the stepping motor 8 is provided on the top surface of the drive wheel 9 coupled to the stepping motor 8, and a fixed limiting member provided on the side of the container 1 is connected to the engagement wall. Alternatively, the heads 4 and 5 may be moved only between the outermost track and the innermost track of the disk 19 by engaging with the mating wall.

Further, in the embodiment, the retaining portion 29 fits into the gap between the holder 14 and the front plate 23, and a stable insertion state of the retaining portion 29 is obtained.
Alternatively, a groove may be provided in the front plate 23 and the retaining portion 29 may be inserted therein. Further, it is also applicable to a mechanism that uses a screw as the drive mechanism for the carriage 6. Further, the invention is also applicable to disk devices that use cartridges other than the cartridge 15 shown in FIG. Of course, the present invention can also be applied to an apparatus in which either one of the heads 4 and 5 is provided.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a part of a magnetic disk device and a protective sheet according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1 showing a state in which the protective sheet is attached.
3 is a bottom view of the magnetic disk cartridge, FIG. 4 is a perspective view of a part of the container of the disk device in FIG. 1, and FIG. 5 is the container in FIG. 4. 6 is a perspective view of the protective sheet. FIGS. 7, 8, and 9 are perspective views showing the protective sheet in a folded state.
Figure 0 is a plan view showing the state in which the protective sheet is attached.
FIG. 11 is a sectional view of a portion corresponding to the line XI-XI in FIG. 10. FIG. 12 is a perspective view showing a part of a protective sheet according to a modified example of the present invention. 1... Container, 2... Turntable, 3... Motor,
4, 5...head, 6,7...carriage, 8...
...stepping motor, 15...cartridge,
22...protective sheet, 23...front plate, 24...
Opening, 28... Main body part, 29... Retaining part, 30... Operation part.

Claims (1)

[Scope of claims for utility model registration] (1) Opening 2 formed in the front plate 23 of the container 1
4, the disk 19 of the cartridge 15 is rotated by a rotation mechanism, and the signal conversion heads 4, 5 supported by the carriages 6, 7 are moved in the radial direction of the disk 19 by a moving mechanism. This is to protect a disk device which is configured to record or reproduce a signal by moving the heads 4 and 5 to a desired track of the disk. opening 24
a body part 28 having a portion 31 for insertion into said container 1 through said container 1 to limit movement of said carriages 6, 7;
a retaining portion 29 that extends substantially perpendicularly to the front plate 23 and is disposed inside the front plate 23; and a retaining portion 29 that is at least partially disposed outside the front plate 23. A protective sheet comprising an operating portion 30. (2) The operating portion 30 is connected to the retaining portion 29
The front plate 23 is bent in the same direction as the front plate 23.
a first portion 38 disposed on the outside of the first portion 38; a second portion 39 that is folded back from the end of the first front portion 38;
and a third portion 40 that is folded from the edge thereof toward the opening 24. The protective sheet according to claim 1, which is a registered utility model.