JP2003196941A - Small sized magnetic disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small sized and easy to handle magnetic disk cartridge which can be surely positioned in the prescribed direction to a disk drive when inserted into a card type disk drive. <P>SOLUTION: A housing 12 of the disk cartridge 10 is provided with a corner section demarcated by a pair of side walls 21, 22 linearly extending in mutually orthogonal direction, and the pair of side walls 21, 22 are provided with projecting and recessing fitting sections 61, 62 which can radially connect and hold four magnetic disk cartridges 10 with each corner section thereof being adjacent. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Electronic devices such as cameras, digital video cameras, and laptop computers
A card-type disc that can be loaded into the card slot of the device
A compact magnetic disk car that can be loaded in a live manner.
It is about the bridge. Conventionally, digital still cameras, digital
Cards for electronic devices such as video cameras and laptop computers
Various recording media can be inserted into and removed from the lot.
Therefore, recording and playback are performed. Such a record
The medium is a semiconductor memory type, hard disk.
Disk type, optical disk type, floppy (registered)
(Trademark) Small magnetic disk such as disk, etc.
Various things are in practical use. [0003] Among these, in the semiconductor,
The memory is easy to handle and the recording capacity is reasonably large.
The most popular, but relatively expensive. did
Therefore, with digital cameras that use these memories,
Transfer the captured image data to a computer etc. and save it
After that, delete the data and use the recording medium repeatedly.
It is common. As a hard disk type, 340
Those with a capacity of MB or 1GB are known, but this is also worth
The data is high, the data is transferred and stored elsewhere, and the recording medium is repeated.
I will use it back. An optical disk type has a recording capacity for its size.
The amount is large, for example 35mm x 41mm x 11mm
256MB of data can be recorded in
I'm trying to realize something with a recording capacity of 12MB
The However, it takes time to write optical discs.
There is a difficulty that recording speed is slow. On the other hand, floppy (registered trademark) disk
About 50mm x 55mm x 2mm
The card slot of a personal computer etc.
A disk drive of a size that can be inserted in
It is also known that it can be filled, but this has a capacity of 40
From the viewpoint of recording a camera image as small as MB.
Insufficient quantity and size is not suitable for digital cameras
Yes. In recent years, digital cameras have made recording easier.
The improvement of image quality due to the development of the image sensor, the deletion of data,
PCs are popular because of the possibility of transfer and the size of recording capacity
Combined with the social background,
However, the recording medium (hereinafter referred to as media) is as described above.
Because it is limited in terms of price and capacity, how it is used
There are limitations. For example, because the media is expensive, 1
Don't have a lot of media on one camera
Then, when the data is full, move it to a computer and delete it.
For example, it is normal to use one piece of media repeatedly
It is as described above. Therefore, the recording medium on the road
Your body may run out, and the media that contains the data
Save the media as it is, or upload it to others
I can't do that. Therefore, data taken with a digital camera.
Can be saved as is, or can be easily uploaded to people
Realization of large-capacity and inexpensive small media
desired. Also, put the data on the PC
Large-capacity and inexpensive small-sized media that can be handed over to people
Realization of deer is desired. In response to such a demand, with a digital camera
Save recorded data or computer data as is
Large capacity that can be easily raised to people
PCs and digital cards as small and inexpensive small media
Card-type disc drive that can be loaded into electronic devices such as cameras
And a magnetic disk that can be loaded into the disk drive.
A medium consisting of a cartridge is conceivable. sand
That is, as such a magnetic disk cartridge,
High-density magnetic recording possible in a housing with a closed shutter
A flexible magnetic disk capable of rotating,
For example, a magnetic disk cartridge with a recording capacity of 200 MB or more
It is considered to be a cartridge. High record density for that
Degree of magnetic recording medium is vapor deposition or sputtering
Metal thin film by the method or barium Fe
Can use light powder or ferromagnetic metal powder
The As an example of using barium ferrite powder,
There is Japanese Patent Application No. 2001-31864 filed by the present applicant.
The "High recording using barium ferrite powder
`` Density magnetic recording medium '' means that the magnetic layer has barium ferrite
A magnetic disk containing powder, which has a high recording density.
For example, Japanese Patent Application No. 20
The number of non-magnetic supports disclosed in 01-205290 is small.
Non-magnetic powder containing non-magnetic powder and binder on at least one side
And a ferromagnetic powder that is a hexagonal ferrite powder and
A magnetic recording medium having a magnetic layer containing a binder in this order
And the nonmagnetic layer is carbon having an average particle size of 10 to 30 nm.
10 to 100 parts by weight of the nonmagnetic powder
50 parts by mass and the thickness of the magnetic layer is 0.2 μm or less
Due to ferromagnetic powder by electron microanalysis
The standard deviation b of the intensity relative to the average intensity a of the element
03 ≦ b / a ≦ 0.4, and the center plane of the magnetic layer is flat
Average roughness Ra is 5 nm or less, 10-point average roughness Rz is 40 n
It is a magnetic recording medium that is m or less. Magnetism using this material
For a magnetic disc, for example, MR capable of high recording density
Information is recorded and reproduced using a magnetic head such as a head. According to the media invention, the recording capacity 2
Memories with a high recording density of 00 MB or more, preferably 500 MB or more
Deer can be realized, for example, stationary
If it is a picture, it will be recorded as 500 sheets, about 1MB each.
Video content for about 30 minutes
Can be recorded. So with a digital camera
Record videos that have been shot or distributed on mobile phones
The user's interest in using the content
Convenience can be improved. Of course, PC
As an inexpensive large-capacity data storage medium
It can be used conveniently and its convenience is great. [0012] It should be noted that a card-type device that can be loaded into an electronic device.
In the case of a personal computer, generally,
Insert it into the card slot of the PC card as shown in (a).
Electrically connected to the socket 4 of the receiving part of the inserted card 2
Is a disc drive 6 that is loaded and digitally
In the case of a small electronic device such as the camera 3, FIG.
As shown in FIG.
This is a disk drive 6 that is connected and loaded.
Therefore, this disk drive 6 is extremely small.
For example, a length of 38 mm to 55 mm and a length of 35 mm to 51
a magnetic disk having a width of mm and a thickness of 3 mm to 5 mm
The cartridge 8 is, for example, 25 mm to 36 mm long.
And a width and a thickness of 1 mm to 3 mm. By the way, such an ultra-small magnetic disk is used.
The cartridge housing is formed into a disc shape and the coin
It has been proposed to handle magnetic recording media with a sense.
The In other words, feel free to put coins into vending machines.
Convenient to handle magnetic recording media
It has been proposed to improve. However, the housing is shaped like a disk.
To identify the orientation of the disc drive
It needs to be possible. That is, the housing
When disc-shaped, the shutter attached to the housing
The disc drive can be inserted regardless of the orientation of
Will come. Shutter is disk drive
If the magnetic disk is not
Information cannot be recorded / reproduced. Therefore,
In a predetermined orientation with respect to the magnetic disk drive
Need to be positioned. Also, such an ultra-small magnetic disk cassette
The cartridges are extremely small, so they can be distributed one by one.
It is not good and there is a risk of losing it.
It is easy to handle if it is configured so that several can be joined together.
And convenient for distribution. In view of the above circumstances, the present invention provides a disc drive.
When inserting live, make sure it is against the disc drive
Small magnet that is positioned in a predetermined orientation and easy to handle
The purpose is to provide a disk cartridge
It is. SUMMARY OF THE INVENTION A compact magnetic device according to the present invention.
The disk cartridge is a card type that can be loaded into an electronic device.
Magnetic disk cartridge that can be loaded into the disk drive
This magnetic disk cartridge is
The magnetic disk is rotatably housed in the ring.
Yes, the housing is linear in the direction perpendicular to each other
Corners defined by a pair of side walls
4 magnetic disks on the pair of side walls.
Each corner of the disk cartridge is close to each other
In this state, a concave / convex fitting part that can be connected and held radially is provided.
It is characterized by that. The housing is a ring of the magnetic disk.
It is roughly equivalent to the circular peripheral wall along the outline and the circumscribing line of this circle
It consists of a pair of side walls extending in the direction orthogonal to each other.
It preferably has a raindrop-shaped outer shape. The housings are directly perpendicular to each other.
Fitted to one outer wall surface of a pair of linearly extending side walls
The convex part is formed with a fitting concave part on the outer wall surface of the other side wall,
The fitting convex portion is connected to another cartridge coupled to the cartridge.
Fits into the fitting recess formed on one side wall of the cartridge
The fitting recess is coupled to the cartridge.
Fitting protrusion formed on the other side wall of another cartridge
It is preferable that it is comprised so that it may fit in a part. So
Therefore, it is preferable that the above uneven fitting is performed in a dovetail form.
Good. Also, the one extending in the direction perpendicular to each other.
The corner defined by the pair of side walls is the magnetic device.
Insert the disk cartridge into the disk drive
Formed at one corner on the trailing side
The side wall provided with a convex portion is perpendicular to the insertion direction and the fitting
The side wall with the mating recess is parallel to the insertion direction.
And are preferred. Furthermore, linearly in the directions orthogonal to each other.
The outer wall surfaces of the pair of side walls extending to the
The outer tangent of the outer wall of the peripheral wall that draws a circle along the contour of the disc
Overhang slightly outside and / or the pair
The upper edge of the side wall of the housing protrudes from the upper surface of the face plate portion of the housing.
Preferably it is. The housing includes a lower shell and a housing.
With the upper shell fitted inside the lower shell from above
And configure this magnetic disk cartridge.
All the components to be constructed are stacked in the lower shell.
It is preferable that it can be assembled. The magnetic device of the present invention constructed as described above.
According to the disk cartridge,
Four magnetic disk cassettes are provided on the pair of side walls extending linearly.
Each corner of the cartridge is close to each other
A concave / convex fitting part that can be held in a radially connected state is provided.
To close the four magnetic disk cartridges together.
4 magnetic devices can be connected while wearing.
One set of disk cartridges can be handled and
Handling and distribution are improved. And the direction of insertion into the disk drive
A fitting convex part is provided on the outer wall surface of the orthogonal side wall so that it is flat with the insertion direction.
Fitting by providing a fitting recess on the outer wall of the side wall
It can avoid that a convex part becomes the obstruction at the time of insertion. In addition, the housing may be a magnetic disk.
Equivalent to a circular peripheral wall along the contour and the outer tangent of this peripheral wall
A pair of sides extending linearly in the direction perpendicular to each other
If it has a raindrop-like shape consisting of a wall,
Ensure that the disc drive is properly
Can be positioned in a fixed orientation. In particular, it extends linearly in directions perpendicular to each other.
The outer wall surfaces of the pair of side walls follow the contour of the magnetic disk.
It projects outward from the outer tangent of the outer peripheral surface of the peripheral wall that draws a circle,
And / or the upper edges of the pair of side walls
If protruding from the upper surface of the face plate,
The disc cartridge is immediately picked up by hand.
The correct insertion direction for the front and back of the disc and the disk drive
Can be identified and the disk drive side
The shape of the cartridge insertion slot is the above two side walls
Disk drive by matching the protruding shape of
Can prevent the wrong insertion of a disk cartridge into
Yes. Also, it extends linearly in directions orthogonal to each other.
Housing corner defined by a pair of side walls
Is at a position away from the outer periphery of the magnetic disk.
Positioning through the housing up and down at the corner
A reference hole is provided, or for example, reflection or transmission of light.
Or information can be read by transmission at a specific wavelength.
The identification piece can be embedded in the housing later.
In this case, the recording capacity is identified by this identification piece.
Because the housing can be shared.
There is also an advantage of being able to. Furthermore, the housing includes a lower shell;
To the upper shell fitted from above to the inside of this lower shell
And this magnetic disk cartridge
All constituent elements are stacked in the lower shell
If it is designed to be assembled with
Get a disc cartridge with excellent assembly performance
be able to. Magnetic disk cartridge according to the present invention
Is particularly suitable for use with digital cameras and for handling
Not only convenient, but because it is a magnetic disk, it is inexpensively manufactured.
You can use a prerecorded disc cartridge.
You can save it and give it to others
I will become. DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic disk according to the present invention will be described below.
An embodiment of a cartridge will be described with reference to the drawings. FIG. 1 is similar to that shown in FIG.
Receiving the card 2 inserted into the card slot of the PC card
A device that is electrically connected to the socket 4 of the container and loaded.
The disk drive 6 and the disk drive 6
1 shows a small magnetic disk cartridge according to the present invention,
The disk cartridge 10 is a flat housing 1
2 rotates a flexible disk-shaped magnetic disk 14
The housing 12 is disc-dried.
Access to the surface of the magnetic disk 14
Rotating shutter 35 that opens and closes the opening
And a circle along the contour of the magnetic disk 14,
Form consisting of two circumscribing lines of the above circles intersecting at right angles to each other
It has a raindrop-like planar shape consisting of an outer edge. The magnetic disk car schematically shown in FIG.
The detailed structure of the cartridge 10 is shown in FIGS.
2 shows the magnetic disk cartridge 10 viewed from above.
3 is a perspective view seen from below, and FIG. 4 is a shutter.
FIG. 5 is a perspective view corresponding to FIG.
It is a disassembled perspective view. This magnetic disk cartridge 10 is
Housing 12 has a metal lower shell 20 and a lower shell
Metal upper shell fitted from above to the inside of the shell 20
And the lower shell as shown in FIG.
The metal shutter 25 on the side 20 is built into the lower shell 20.
The metal shutter 35 on the upper shell 30 side is
Placed on the outside of the base 30 and all components are
Can be assembled in the stack 20
Yes. As is apparent from FIG. 5, the lower shell 20
Is a bottom plate 20 that defines a planar profile of the housing 12.
a and the circumference of the bottom plate 20a except for the opening 24 described later.
A peripheral wall rising upward from the edge, and on the bottom plate 20a
Standing up from the outer edge of a triangular corner along the two outer tangents
The pair of hanging side walls 21 and 22 are directly in directions perpendicular to each other.
It extends linearly, and the upper edges of these side walls 21, 22 are the upper shell 3
It protrudes from the upper surface of 0, and both ends form a circumferential surface
Misinserted by protruding slightly outward from the circumscribing line of the peripheral wall 20b
It forms a prevention wall. And one side wall 21 is
To the disk drive 6 of this disk cartridge 10
How to insert at the trailing corner with respect to the insertion direction
The other side wall 22 is inserted in a direction perpendicular to the direction.
It is formed parallel to the direction. Disc of this side wall 22
The end on the leading side with respect to the insertion direction to the live 6 is
An insertion positioning step 22a for the disk drive 6 is provided.
Forming. Also defined by the side walls 21 and 22
The upper and lower shells 30,
20 is penetrated in a direction substantially parallel to the rotation axis of the magnetic disk 14.
Hole 16 is formed, and the hole 16 on the lower shell 20 side is located
It is a standard hole. The lower shell 20 is orthogonal to each other.
The outer wall surfaces of the pair of side walls 21 and 22 that extend are shown in FIG.
As shown, each of the four magnetic disk cartridges 10
These corners are connected radially with each other close to each other.
An uneven fitting portion that can be held is provided. That is,
Of the pair of side walls 21, 22, the disk drive 6
On the outer wall surface of the side wall 21 extending in the direction orthogonal to the insertion direction,
A fitting convex portion 61 is formed and inserted into the disk drive 6.
On the outer wall surface of the side wall 22 parallel to the direction, this cartridge
10 formed on the side wall 21 of another cartridge to be coupled to
A fitting recess 62 that can be fitted into the fitting projection 61 is formed.
Has been. The center of the magnetic disk 14 has a center.
The center of the bottom plate 20a of the lower shell 20 is fixed to the core 15
The center has the bottom of the center core 15 facing outside.
A hole 23 is formed. The upper surface around the center hole 23
For this purpose, an annular portion 25a of the lower shutter 25 described later is rotated.
An annular wall 20c that is pivotally supported is formed coaxially, and
In addition, the annular wall 20c has a flat upper surface on which
In order to support the center of the lower sliding sheet 28 described later
The smaller-diameter annular wall 20d is coaxially formed.
The These large and small annular walls 20c and 20d are connected to the bottom plate 20a.
Can be formed by squeezing. Ma
In addition, it is formed at the corner of the bottom plate 20a of the lower shell 20.
An annular wall around the positioning reference hole 16 (not shown)
Is formed by squeezing. Further, the lower shell 20 has a center hole 23.
The disk drive on the side opposite to the positioning reference hole 16 side.
A magnetic head to be described later on Eve 6 is attached to the surface of the magnetic disk 14.
A fan-shaped opening 24 for access to the center
Formed around the hole 23 over a predetermined angular range,
A rotary lower shutter 25 that opens and closes the opening 24 has a lower shutter.
It is arranged inside the shell 20. The lower shutter 25 is located above the lower shell 20.
A central ring pivotally supported by the annular wall 20c
Over a larger angular range than the opening 25 and the opening 24
The fan-shaped main plate 2 extending radially from the annular portion 25a
5b and upward along the arc-shaped outer edge of the main plate portion 25b
And a vertical plate portion 25c bent at a substantially right angle.
It is. On the other hand, the upper shell 30 is the bottom of the lower shell 20.
A top plate 30a that is substantially similar to and slightly smaller than the plate 20a;
Lower from the periphery of the top plate 30a except for the portion of the opening 34 to be described
And is elastic to the inside of the peripheral wall 20b of the lower shell 20
A peripheral wall 30b to be fitted, and the lower shell 20 is opened.
The magnetic drive of the disk drive 6 is
For accessing the surface of the magnetic disk 14
An opening 34 is formed, and an upper shaft that opens and closes the opening 34 is formed.
A utter 35 is provided outside the upper shell 30. Further, the upper shells 30 orthogonal to each other.
The outer edge is defined by two straight lines extending in the direction
In the corner, the positioning reference hole 16 on the lower shell 20 side
Adjacent to the matching hole 16, for example, light reflection, transmission or
Is an identification piece that can read information by transmission of a specific wavelength
A hole 17 is formed in which 18 can be embedded later.
Yes. An annular wall (not shown) is provided on the lower surface around the hole 16.
It is formed by drawing. The upper side which is substantially similar to the lower shutter 25.
The shutter 35 includes a central annular portion 35a and the annular portion.
A fan-shaped main plate portion 35b extending radially from 35a;
Substantially downward at right angles along the arc-shaped outer edge of the main plate portion 35b
And a bent vertical plate portion 35c.
In order to open the utters 25 and 35, the main plate portion 35b
Open the shutter from the outer edge on the leading side in the shutter opening direction.
A raised operating protrusion 35d is provided. In addition, this
The upper edge of the shutter operating protrusion 35d is
It is almost the same as the upper edge of the corner side walls 21 and 22 of the udging 12
It is specified to be height. Then, as will be described later, they are connected to each other during assembly.
The vertical plate portions 25c and 35c to be connected are rotatably accommodated.
Therefore, the shutters on both sides of the opening 24 of the lower shell 20
-Stretch radially outward over the rotation range of 25 and 35
Protruding peripheral walls 26 and 27 are formed, and these peripheral walls 26 and 27 are formed.
Concave portions 26 a and 27 a are formed inside 27. FIG.
The recesses 26a and 27a appear as arcuate grooves.
ing. Further, on the top surface of the top plate 30a of the upper shell 30,
Are the annular portion 35a and the main plate portion 35b of the shutter 35.
For accommodating the rotation of the shutter 35
A recess 36 (see FIG. 5) is formed, and the center of the recess 36
The part is provided with a pivotable shaft 35a of the shutter 35.
A circular convex portion 37 for supporting is formed. And
The annular portion 35a of the shutter 35 is pivotally supported by the circular convex portion 37.
If the main plate 35b of the shutter 35 is
The vertical plate portion 35 c is in contact with the bottom surface and the opening 34 of the upper shell 30.
So as to cover the outer side of the arc-shaped peripheral wall 30b on both sides of the
Yes. In addition, the upper side of the vertical plate 25c of the lower shutter 25
The edge and the lower edge of the vertical plate portion 35c of the upper shutter 35
After the upper shell 30 is fitted to the lower shell 20,
Place the side shutter 35 on the upper shell 30 from above
Fitting parts that fit together by applying force (not shown)
The upper and lower shutters 3 are formed by this fitting.
5 and 25 are integrated. FIG. 6 shows a linear extension in directions orthogonal to each other.
Fitting convex provided on the side walls 21 and 22 of the lower shell 20
Four cartridges using the portion 61 and the fitting recess 62
1 is a schematic plan view showing a state in which 10 is coupled. sand
That is, each of the four magnetic disk cartridges 10
Triangular corner defined by the side walls 21 and 22
In a manner that the parts are gathered close to the center position radially
Combined, a set of four magnetic disk cartridges 10
Can be handled and held in that state.
ing. The part shown by hatching in FIG.
This is a joint portion formed by the portion 61 and the fitting recess 62. In addition,
These joints are preferably joined in a dovetail form.
Yes. This magnetic disk cartridge 10 is
All components are assembled on the lower shell 20 in a stacking manner
Next, the structure described above is used.
Along with the explanation of the components other than the component, this magnetic disk
Refer to FIG. 5 for the assembly method of the cartridge 10
I will explain. First, the annular wall 2 of the bottom plate 20a of the lower shell 20 is used.
The annular portion 25a of the lower shutter 25 is fitted to 0c. This
In the case of the shutter 25, the vertical plate portion 25c of the shutter 25 is opened.
The aspect which touches the inner wall surface of the recessed part 26a of the both sides of 24, 27a
The main plate 35b closes the opening 24 of the lower shell 20
Position. Next, the lower sliding sheet 28 is disposed. this
The sliding sheet 28 is substantially similar to the bottom plate 20a of the lower shell 20.
Fan-shaped opening 28a extending outward from the center hole,
Corner defined by two straight lines perpendicular to each other
And the center hole of the bottom plate 20a of the lower shell 20
The flat upper surface of the lower annular wall 20c is fitted into the annular wall 20d.
Support with. The sliding sheet 28 has a lower shim at the corner.
Positioning reference hole 16 formed in the bottom plate 20a of the bell 20
Is provided with a hole 28b that coincides with the hole 28b.
Annulus formed around the positioning reference hole 16 of the bell 20
The corners of the sliding sheet 28 are supported by fitting the walls. Next, a magnetic disk having a center core 15 is provided.
And the openings 38a and the corners.
And is formed in the same shape as the lower sliding sheet 28 with holes 38b.
After the upper sliding sheet 38 is disposed, the upper shell 30
The peripheral wall 30b of the lower shell 20 is fitted inside the peripheral wall 20b
To do. As a result, the shafts in the recesses 26a and 27a are
The vertical plate portion 25c of the utter 25 is connected to the concave portions 26a and 27.
a and a groove formed by the peripheral wall 30b of the upper shell 30
Can move along the groove. Also, the upper shell 30
Annulus of holes 16 formed in the corners of the top plate 30a
The wall fits into the hole 38b in the corner of the upper sliding sheet 38
And when the corner portion of the sliding sheet 38 is supported
The corners of the upper and lower sliding sheets 28, 38 are
Also supported by the inner wall of the corner wall of the shell 30
Is done. Next, the upper shutter 35 is arranged in its annular shape.
The portion 35a is pivotally supported by the circular convex portion 37 on the upper surface of the upper shell 30.
The vertical plate 35c is attached to the lower shutter.
Combined with the vertical plate portion 25c of the shutter 25, the shutter 25,
35 is integrated. Next, the planar shape for urging the shutter
The spiral spring 40 is fitted into the circular convex portion 37, and this spiral bar is
The inner end 40b of the screw 40 is used as the slit 37b of the circular convex portion 37.
The outer end 40a is engaged with the main plate portion 35b of the shutter 35.
By locking in the notch 35e, the shutter 2
5 and 35 are biased in the closing direction and are held in the closed position.
The Next, an opening that follows the opening 34 of the upper shell 30.
41a and larger diameter than the recess 36 of the upper shell 30
The metal cover plate 41 is shown by a broken line 41b in FIG.
The center portion shown is on the circular convex portion 37 of the upper shell 30.
Adhering and bonding the peripheral edge onto the top plate 30a of the upper shell 30
So that the spiral spring 40 does not come off.
Along with the shutter 3 on the lower surface side of the cover plate 41
5 rotation spaces are defined, and the disc cartridge is
Assembling of the wedge 10 is completed. The upper surface of the cover plate 41 is an uneven surface.
By doing so, the front and back of the disk cartridge 10
Can be identified by touch. Or cover play
Apply fluorescent paint to the top surface of
Even if the front and back of the disk cartridge 10 can be identified
Good. Furthermore, the top surface of the cover plate 41 is matted
So that you can write numbers with a pencil
Yes. Alternatively, as shown, the upper surface of the cover plate 41
For example, a paper-made circular label 42 is affixed to the information.
May be written. In that case,
Sewing machine along the outline of the opening 41a of the cover plate 41
An eye 42a is provided on the label 42, and the perforation 4 is used when used.
The area 42b surrounded by 2a is cut out.
Therefore, the virgin guarantee for unused cartridges 10 is provided.
The exposed upper shutter 35 can be maintained.
You can also protect yourself. The peripheral walls 30 of the upper and lower shells 30 and 20
b, 20b, in order to fit each other elastically, the peripheral wall 30
b, 20b, for example, on the peripheral wall 30b
By providing a plurality of slits 39 such as
It is preferable to give elasticity to the wall 30b. Also, the lower side
Upper surface and upper shutter of main plate portion 25b of cutter 25
The opening of the upper shell 30 is formed on the lower surface of the main plate portion 35b of
34 and openings 28a, 38a of the sliding sheets 28, 38
That contacts the surface of the rotating magnetic disk 14 through
Leaning members 44 are attached radially, respectively.
Yes. The cleaning member 44 includes shutters 25 and 35.
Radial along the edges of the main plate portions 25b, 35b in the closing direction
Attached to the cleaning member 44.
When the magnetic disk 14 is stationary, the magnetic disk
14 on the main plate portions 25b and 35b of the shutters 25 and 35.
It also has a function of preventing contact. In addition, the shutters 25 and 35 are opened and magnetized.
Cleaning member 4 when disk 14 is rotating
4 is in contact with only one part of the surface of the magnetic disk 14
Then the balance when rotating the magnetic disk 14 is bad,
Sliding sheet provided for protecting the magnetic disk 14
28, 38 on the surface facing the magnetic disk 14,
The protrusion 45 having the same height as the ning member 44 is shut.
180 degree deviation from the cleaning member 44 when the
It is preferable to provide them radially at the positions. 2 each
The protrusion 45 of the book is attached to the cleaning member 4 when the shutter is opened.
May be provided radially at a position deviated by 120 degrees with respect to 4.
Yes. FIG. 7 shows a magnetic disk in the disk drive 6.
Schematic showing the state when inserting the cartridge 10
FIG. 8 is a plan view, and FIG.
It is a schematic plan view showing a state where it is attached to the squire drive 6.
is there. 7 and 8 show the magnetic disk cartridge.
Explanation of relative positional relationship between wedge 10 and disk drive 6
The details are omitted. The disk drive 6 has a cartridge inserted.
A slot 6a and an internal cartridge storage space 7;
In addition, the insertion passage of the cartridge 10 is usually provided
(The end of the passage is indicated by a broken line L)
A head assembly having a pair of upper and lower rotary arms 51
50 and insertion of the cartridge 10 into the disk drive 6
Along with the fitting, it is fitted to the operating protrusion 35d of the shutter 35.
The shutter that opens the shutters 25 and 35
And an actuating member 52. The tip of the arm 51 has a magnet
The air heads 53 are fixed so as to face each other.
Configured to access both sides of the magnetic disk 14
Has been. The cartridge insertion slot 6a
Is the head assembly 50 side of the disk drive 6
The side wall surface 6b is formed in contact with the opposite side wall surface 6b.
Next, the insertion position of the side wall 22 of the magnetic disk cartridge 10
A positioning projection 6c that fits into the positioning step 22a is formed.
It is. Although illustration is omitted, cartridge insertion
Magnetic disk cartridge on the upper edge of the slot 6a
10 side walls 22 and the shutter 3 in the closed position
5 in the position corresponding to the operating protrusion 35d for operation.
The magnetic disk is formed with a notch that allows the passage of the magnetic disk.
Incorrect insertion of the cartridge 10 is prevented. The magnetic disk cartridge 10 is shown in FIG.
Inserted into the disk drive 6 from the direction indicated by the arrow,
On the other hand, the operating protrusion 35d provided in the shutter 35
In addition, the shutter operating member 52 of the disk drive 6 is engaged.
As the magnetic disk cartridge 10 is inserted,
The shutters 25 and 35 are opened. In that case, the upper side
The projection 35d for operating the shutter 35 is a magnetic disk car.
It is provided on the right side with respect to the insertion direction of the trench 10
As the magnetic disk cartridge 10 is inserted
From the shutter operating member 52 to the magnetic disk cartridge.
To rotate the wedge 10 clockwise in the figure
Force F is applied, but the corner portion of the housing 12
The outer wall surface of the side wall 22 extending linearly is the disk drive 6.
To abut against the inner wall surface 6b of the inner wall to prevent rotation
Yes. Then, as shown in FIG.
Ridge 10 is completely inserted into disk drive 6
And the arm 51 of the head assembly 50 is counterclockwise as shown in the figure.
And the magnetic head 53 is moved to both sides of the magnetic disk 14.
Access the face. As is apparent from the above description, the present invention
The magnetic disk cartridge 10 has a housing 1
2 is a circle along the contour of the magnetic disk 14 and
The outer edge of the shape consisting of the two tangents of the above circles intersecting the corner
The disc by having a raindrop-like planar shape consisting of
When inserting into the drive 6, the disc drive 6
Positioning in a predetermined direction can be ensured. In particular, the housings 12 that are orthogonal to each other.
The outer wall surfaces of the pair of side walls 21, 22 extending linearly in the direction,
A circle along the contour of the magnetic disk 14 adjacent to this is drawn.
Slightly outward from the outer tangent of the outer peripheral surface of the peripheral wall 20b to be drawn
And the upper edges of the pair of side walls 21 and 22 are housing
Because it protrudes from the upper surface of the face plate
Just pick the cartridge 10 by hand,
The front and back of the ridge 10 and the positive to the disk drive 6
New insertion direction can be identified and
Shape of cartridge insertion slot 6a on the side of the drive 6
Is matched with the protruding shape of the side walls 21 and 22
To prevent erroneous insertion of the disk cartridge 10
Can do. Further, four pieces are provided on the pair of side walls 21 and 22.
Each of the magnetic disk cartridges 10 at each corner
Convex protrusion that can be held in a state where the parts are close together
The portion 61 and the fitting recess 62 are provided.
4 magnetic disk cartridges 10 as a set
Can be handled, improving handling and distribution
The The direction of insertion into the disk drive 6
The fitting convex part 61 is provided in the side wall 21 orthogonal to the insertion direction and
By providing the fitting recess 62 in the parallel side wall 22,
It is possible to avoid the joint protrusion 61 from becoming an obstacle during insertion.
Yes. Also, it extends linearly in directions orthogonal to each other.
A housing defined by a pair of side walls 21 and 22
The position where the corner is away from the outer periphery of the magnetic disk 14
Because of this, the housing is penetrated up and down at this corner.
For example, a positioning reference hole 16 may be provided, or
Information by light reflection, transmission or transmission at a specific wavelength
A readable identification piece 18 is placed in the housing 12
Can be embedded in this case.
Therefore, since the recording capacity can be identified,
There is also an advantage that can be shared. Further, the housing 12 has a lower shell 20.
And an upper cover that is fitted inside the lower shell 20 from above.
And the magnetic disk cartridge.
All the components that make up the cartridge 10
Cover plate 4 adhered on circular recess 37 of
Except 1, all fit in the lower shell by stacking method
So that it is ultra-compact.
While having the advantage of excellent assembly
is there. Furthermore, in this embodiment, the lower shell
20, upper shell 30, cover plate 41 and shaft
Tutters 25 and 35 are all made of metal and assembled
Since this is done in a stacked manner, metal materials and their
It is possible to separate and dispose of other plastic materials
It is easy and has an effect of preventing environmental pollution.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic illustration showing a small magnetic disk cartridge according to the present invention together with a disk drive into which the disk cartridge is inserted and an electronic device having a card slot into which the disk drive is loaded. FIG. 2 is a perspective view of an embodiment of a small magnetic disk cartridge according to the present invention as viewed from above. FIG. 3 is a perspective view of the small magnetic disk cartridge of FIG. 2 as viewed from below. 2 is a perspective view corresponding to FIG. 2 showing the magnetic disk cartridge with the shutter opened. FIG. 5 is an exploded perspective view of the small magnetic disk cartridge in FIG. 2. FIG. 6 shows a state in which four magnetic disk cartridges are combined. FIG. 7 is a schematic plan view showing a state when the small magnetic disk cartridge of FIG. 2 is inserted into a disk drive. FIG. 8 is a schematic plan view showing a state in which the small magnetic disk cartridge of FIG. 2 is loaded in the disk drive. FIG. 9 is a disk drive which is a premise of the present invention and is loaded with this disk drive. Schematic explanatory diagram shown together with an electronic device having a card slot [Explanation of symbols] 6 Disk drive 10 Magnetic disk cartridge 12 Housing 14 Magnetic disk 15 Center core 18 Identification piece 20 Lower shells 21, 22 Side walls 24, 34 For magnetic head access Openings 25 and 35 Shutters 28 and 38 Sliding sheet 30 Upper shell 40 Spiral spring 41 Cover plate 42 Label 44 Cleaning member 45 Projection 50 Head assembly 51 Arm 52 Shutter operation member 53 Magnetic head 61 Fitting protrusion 62 Fitting recess

Claims (1)

1. A magnetic disk cartridge that can be loaded into a card-type disk drive that can be loaded into an electronic device, the magnetic disk cartridge having a magnetic disk rotatably accommodated in a housing. The housing includes a corner portion defined by a pair of side walls extending linearly in a direction orthogonal to each other, and four magnetic disk cartridges are respectively provided on the pair of side walls. A compact magnetic disk cartridge comprising a concave-convex fitting portion that can be held in a state where corner portions are close to each other in a radial manner.