JP2003196944A - Small sized magnetic disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a shutter of a magnetic disk cartridge inserted in a magnetic disk drive normally closed and locked so as to protect the magnetic disk and to prevent the shutter from inadvertently opening. <P>SOLUTION: A latch arm 64 is provided in the recessed section 36 of an upper shell 30. The latch arm 64 is provided with a protrusion 66 at the free end and a tongue piece 70 at the position shifting from the protrusion 66 to a fixed end side. The protrusion 66 is engaged with a locking hole 72 of an upper shutter 35 and the tongue piece 70 is engaged with a hole 74 of a cover plate 41. The tongue piece 70 is formed higher than the protrusion 66. When the magnetic disk cartridge utilizing the lock mechanism is inserted into the magnetic disk drive, the tongue piece 70 is pressed down by a projecting part in the magnetic disk drive to disengage the locking hole 72 of the shutter 35 and the protrusion 66. <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
You can save the media as it is or give it to others
I can't do that. Therefore, data taken with a digital camera.
Can be stored as is, or can be easily given to others
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 given to others
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,
Flexible magnet in a housing with a closed shutter
A disk is rotatably accommodated, for example, 200MB or more.
Magnetic disk cartridge with recording capacity
Considered. As a high recording density magnetic recording medium
Is a metal thin film deposited by vapor deposition.
Metal thin film or barium
A material using a cerite powder or a ferromagnetic powder can be employed.
As an example of using barium ferrite powder,
There is Japanese Patent Application No. 2001-31864 filed by the applicant. "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 above media, the recording capacity is 200 MB.
High recording density media of 500MB or more, preferably 500MB or more
Thus, for example, a still image
If it is possible to record 500 sheets, about 1MB each
If it is a video, record video content for about 30 minutes.
It becomes possible to record. So take a picture with a digital camera
Recorded videos and videos distributed on mobile phones
User convenience when using content
Can be improved. Also, of course on a PC
Convenient as an inexpensive large-capacity data storage medium
The 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, the disk drive is generally shown in FIG.
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 a 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 shaped like a disc
It has been proposed to handle magnetic recording media with a sense.
The That is, feel free to put coins into vending machines.
Convenient to handle magnetic recording media
It has been proposed to improve. In such a type of magnetic recording medium,
However, it is the same as a conventional floppy disk
In order to protect the magnetic disk from external influences,
Magnetic recording media opening for disk access
A shutter to open and close is required. But magnetic recording
Since the media is small, do not touch your shutter with your fingers.
There is a risk that the shutter will open. The present invention has been made in view of the above circumstances.
The magnetic disk cartridge is a disk drive
Protect the magnetic disk under normal conditions when not inserted in
To close and open accidentally
To provide a small magnetic disk cartridge without
It is the purpose. [0016] A small magnetic device according to the present invention is provided.
A disk cartridge is a card-type disk for electronic equipment.
Magnetic disk cartridge that can be loaded into the drive
This magnetic disk cartridge is placed in the housing.
A flexible magnetic disk is housed rotatably.
The housing is a card type disk drive
To access the surface of the magnetic disk
Opening and closing direction with a locked part that opens and closes the opening
A spring-biased shutter and a shutter that closes the opening.
A locking portion that locks with the locked portion at the closed position of the
Insert the magnetic disk cartridge into the disk drive
The locking part corresponds to the locking part of the magnetic disk drive.
In cooperation with the corresponding part, the locking part and the locked part of the shutter
Characterized by being configured to release the engagement of
Is. The small magnetic disk cartridge is an electric
Magnetics that can be loaded into card type disk drives for slave devices
A disk cartridge, the magnetic disk car
The cartridge is flexible in a generally disc-shaped housing.
A magnetic disk is housed in a rotatable manner.
Uzing uses card-type disk drive magnetic heads
An opening for accessing the surface of the magnetic disk;
Rotates approximately coaxially with ousing, in the closing direction to open and close the opening
With a spring-biased shutter and shutter closed position
Latch arm with elasticity that latches with shutter
With a magnetic disk cartridge
When inserting into the drive, the latch arm
Has a cam that flexes the latch arm by cam engagement with the convex part.
Even if it is configured so that the latch engagement is released thereby
Good. A locking hole is provided in the shutter, and the housing is
The latch arm of the jing
Formed and a shutter at the free end of the latch arm
A protrusion that engages with the locking hole of the
The portion may be provided between the free end and the fixed end. Also this
The cam part is a tongue and its height is the protrusion of the latch arm.
It is preferable that the height is higher than the starting height. The small magnetic disk cartridge is an electric
Magnetics that can be loaded into card type disk drives for slave devices
A disk cartridge, the magnetic disk car
The cartridge is flexible in a generally disc-shaped housing.
A magnetic disk is housed in a rotatable manner.
Uzing uses card-type disk drive magnetic heads
An opening for accessing the surface of the magnetic disk;
Rotates approximately coaxially with ousing, in the closing direction to open and close the opening
With a spring-biased shutter and shutter closed position
Provided on the outer periphery of the housing that latches with the shutter
And a latch arm having elastic properties.
When inserting a cartridge into the disk drive,
The arm is pushed by the protruding part of the disk drive.
And the latch engagement is released.
You may comprise. The latch arm is formed on the peripheral wall of the upper shell.
Formed at the winding end and has a protrusion at the free end
The lower shell has a notch into which the protrusion is inserted.
The shutter has a notch that engages the protrusion of the latch arm.
And the shutter is between the upper shell and the lower shell
You may comprise so that it may rotate. The magnetic device of the present invention constructed as described above can be used.
Disk cartridge housing magnetic head
An opening to access the surface of the disc and an opening
A spring-biased shim that opens and closes and has a locked part.
Lock the locked part and the locked part at the shutter closed position.
And a locking portion. This magnetic disk cartridge
When inserting the disc into the disk drive,
The locking part and shutter in cooperation with the corresponding part of the disk drive
-It is configured to release the engagement with the locked part.
The Therefore, the magnetic disk cartridge is
In the normal state when not inserted into the
Closed and locked to protect the disc
It will not open accidentally and will
Only when a disk cartridge is inserted in the disk drive
Since the shutter opens, the magnetic disk can be securely
Protected. 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 the same as that shown in FIG.
Of the card 2 to be inserted into the card slot of the PC card
A device that is electrically connected to the socket 4 of the receiving portion and loaded.
Disk drive 6 and the disk drive 6
A small magnetic disk cartridge according to the present invention is shown.
The disc cartridge 10 has a flat disk shape.
Flexible disk-shaped magnetic disk in the housing 12
14 is rotatably accommodated, and the housing 12 is
The magnetic head of the disk drive 6 is placed on the surface of the magnetic disk 14.
Rotating shutter that opens and closes the opening to access the surface
And the contour of the magnetic disk 14
And the circumscribed line of the two circles that intersect at right angles to each other
It has a planar shape consisting of the outer edge of the shape consisting of 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 side wall rising upward from the edge, and the bottom of the side walls
Outside the straight corners along the two circumscribing lines of the plate 20a
The side walls 21 and 22 rising from the edge have upper edges at the upper edge.
It protrudes from the upper surface of the shell 30 and both ends are adjacent to it.
The outer tangent of the side wall (peripheral wall) 20b that forms the contacted circumferential surface
It protrudes slightly outward to form a wrong insertion prevention wall.
The And one side wall part 21 is this disc cart.
The insertion direction of the ridge 10 into the disk drive 6
To be perpendicular to the insertion direction at the corner on the railing side
The other side wall 22 is formed parallel to the insertion direction.
It is. Inserting the side wall 22 into the disk drive 6
The end on the leading side with respect to the entry direction
An insertion positioning step 22a for the hub 6 is formed.
Also, the housing defined by the side walls 21 and 22
At the 12 corners, the upper and lower shells 30 and 20 are magnetically
A hole 16 penetrating in a direction substantially parallel to the rotational axis of the disk 14
The hole 16 (FIG. 3) on the lower shell 20 side is positioned.
It is a reference hole. At the center of the magnetic disk 14 is 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.
The annular wall 133 (FIG. 9) is also provided around the positioning reference hole 16.
Is formed by squeezing or burring
The 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. Furthermore, the upper shell 30 is perpendicular to each other.
In the corner where the outer edge is defined by the straight line of the book
Is a hole that matches the positioning reference hole 16 on the lower shell 20 side.
Adjacent to 16 for example light reflection, transmission or specific wavelength
The identification piece 18 (see FIG.
2 and FIG. 4) are formed with holes 17 that can be embedded later.
Has been. An annular wall (not shown) is formed on the lower surface around the hole 16.
(Omitted) is formed by drawing. An upper side that 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
Same as the upper edges of the corner side walls 21 and 22 of the udging 12
It is defined to be one 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
-Overhangs radially outward over the rotation range of 25 and 35
Peripheral walls 26 and 27 are formed, and these peripheral walls 26 and 27 are formed.
Recesses 26a and 27a are formed on the inside. Figure 2
The recesses 26a and 27a appear as arcuate grooves.
Yes. Further, on the upper 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
Engaging parts that engage with each other by applying force (not shown)
The upper and lower shutters 3 are formed by this engagement.
5 and 25 are integrated. 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 portion 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 device 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 a hole 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 moved to 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 -35.
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. Also, 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. Next, the magnetic disk cartridge of the present invention
Explanation of the lock mechanism of the 10 shutters 25 and 35
To do. Although omitted in the above description, the upper and lower shafts
The openings 35 and 25 have openings 3 in the upper and lower shells 30 and 20.
A lock mechanism that locks with 4 and 24 closed is provided.
Can Hereinafter, the shutters 35 and 25 are locked.
The mechanism will be described with reference to FIG. FIG.
Upper shell 3 for explaining the lock mechanism 60 of the first embodiment
0, perspective view of upper shutter 35 and cover plate 41
It is. The lower shutter 25 (FIG. 5) and the upper shutter
Since the cutter 35 is coupled as described above, the upper shutter 35 is
Only the cutter 35 will be described. In FIG.
Only the main parts necessary for the hook mechanism 60 are shown, and the others are omitted.
explain. As shown in FIG. 6, the upper shell 30 made of metal
The concave portion 36 is substantially coaxial with the circular convex portion 37 and has a width in the radial direction.
An arcuate curved opening 62 having the shape is formed. this
The curved opening 62 has a plate-like shape that is substantially similar to the curved opening 62.
The latch arm 64 is an opening of the curved opening 62.
The opening 34 is integrated with the recess 36 from one end far from the end 34.
It protrudes toward the direction. Free end of latch arm 64
The inner side in the radial direction is inclined forward, that is, toward the opening 34 side.
A protrusion 66 having an inclined surface 66a protrudes upward.
The protrusion 66 is circumferential, that is, the upper shutter 35 is rotated.
It has a plate surface along the direction. Also, the latch arm 64
A notch 68 is formed at the free end on the radially outer side of
With you. Tongue piece (cam part) 7 desired in this notch 68
0 is formed. In other words, the tongue piece 70 is latched.
Formed between the free end and the fixed end of the screen 64. this
The projection 66 and the tongue piece 70 are formed by cutting and raising.
Has been. The tongue piece 70 has a plate surface in the radial direction and instantly.
The magnetic disk cartridge 10
It is formed along the direction C to be inserted into the hub 6. Tongue 7
An arc-shaped cam 70a is formed at the upper end of zero.
The tongue piece 70 inserts the magnetic disk cartridge 10 into the disk.
When inserting the disc drive,
Cam engages with a member (convex portion) (not shown). And luck
The arm 64 is elastic because its free end is pushed downward.
But when the cam engagement is completed, it will elastically return to its original position.
Return. Even if the shape of the cam 70a is not an arc,
The latch arm 64 is engaged with a member on the disk drive 6 side.
Any shape that can push down
can do. On the other hand, the upper shutter 35 closes the opening 34.
Main plate 3 of upper shutter 35 when in the closed position
5b, the position corresponding to the protrusion 66 is engaged with the protrusion 66.
A locking hole (locked portion) 72 is formed. Also,
On the cover plate 41 located above the upper shutter 35
Is formed with a hole 74 through which the tongue piece 70 is inserted.
The These latch arm 64 and locking hole 72
A mechanism 60 is configured. Next, referring to FIG.
The operation of 60 will be described. FIG. 7 shows a lock mechanism 60.
FIG. 7 is a partial enlarged cross-sectional view of FIG.
The However, the latch arm 64 is shown in an uncut state.
The As can be seen from FIG.
The cover plate 41 and the
Then, the projection 66 engages with the locking hole 72 and the tongue piece 70 is the hole.
74 is inserted. FIG. 7 shows the ratio of each part for explanation.
Rates and dimensions are exaggerated. The state shown in FIG.
The shutter 35 is locked in the closed position,
In this state, apply external force to open the upper shutter 35.
Even so, the protrusion 66 and the locking hole 72 are engaged.
I can't open it. The tongue piece 70 of the lock mechanism 60 has a cover.
It is important that it protrudes from the plate 41. Real
In the embodiment, the cover plate 41 is positioned on the tongue piece 70.
Hole 74 is formed, but the tongue piece 70 and
Position relationship where cover plate 41 does not interfere, or cover
-If the plate 41 is shaped to escape, the cover plate
It is not always necessary to provide the hole 74 in the seat 41. further
This protrusion amount is the allowance between the protrusion 66 and the locking hole 72, that is,
A droop between the tip of the projection 66 and the lower surface 35f of the upper shutter 35
It is important that it is larger than the direct distance D. This magnetic disk cartridge 10 is inserted.
The inner surface of the magnetic disk drive 6 is
A convex portion (not shown) corresponding to the tongue piece 70
Part) is formed, and this lock mechanism 60 is provided.
Magnetic disk cartridge 10
And the tongue 70 is engaged with the cam,
The piece 70 is pushed in the direction indicated by the arrow B in FIG.
The screen 64 bends downward. And the tip of the latch arm 64
As shown by the phantom line, the projection 66 at the end, that is, the free end
And the engagement with the locking hole 72 is released, and the upper shutter
35 and the lower shutter 25 can be opened. Protrusion
66 from the fixed end of the latch arm 64 rather than the tongue 70.
Since the distance is greater than the amount of displacement of the tongue piece 70, it is effective.
Thus, the engagement of the protrusion 66 can be released. When the shutters 35 and 25 are restored,
The edge 35g of the shutter 35 is the slope 6 of the projection 66.
After sliding on 6a, the locking hole 72 and the protrusion 6 again
6 is engaged and locked. Next, the locking mechanism of the second embodiment will be described.
This will be described with reference to FIG. FIG. 8 shows the second locking machine
FIG. In FIG. 8, the lock machine
Only the part related to the structure 80 is shown, and the other parts are omitted.
It is. In this embodiment, the upper shutter 35 and the lower shutter
Latch tongue piece as a latch arm for locking the shutter 25
(Locking portion) 82 of the arc-shaped peripheral wall 30b of the upper shell 30
Shaped at the leading end, ie, leading end, viewed from the insertion direction C
It is made. The latch tongue 82 of the peripheral wall 30b is opened.
By a groove 83 extending from the opening 34 along the outer periphery of the peripheral wall 30b.
Formed so that it can be bent in the radial direction of the upper shell 30.
It has sex. The latch tongue 82 has a free end
Bending the tip of the tongue piece 82 to form an outward projection 84
It is made. The tip side of the protrusion 84 is directed toward the opening 34.
An inclined surface 84a is formed, but the inclined surface 84a
The rear part is a locking surface that rises almost vertically from the latch tongue 82
84b. On the other hand, the upper shutter 35 and the lower shutter
-25, these shutters 35, 25 are in the closed position
At the position corresponding to the protrusion 84 described above.
Notches (locked portions) 85 and 86 that engage with the base 84 are formed.
Has been. These notches 85 and 86 are the upper shutter
When 35 and the lower shutter 25 are connected, that is, integrated.
When it does, it is aligned at the same position. The upper shell 30 is
The peripheral wall 30b is set inside the peripheral wall 20b of the lower shell 20.
Assembled from the middle part of the latch tongue 82.
The peripheral wall 20b of the lower shell 20 where the portion reaching the fixed end is exposed
Is formed with notches 88 larger than the notches 85 and 86.
It is. Usually, upper shutter 35 and lower shutter 25
The notches 85 and 86 and the projection 84 are engaged and locked.
Maintained. Notches 85, 86 and 88
The portion shown may be an opening whose periphery is closed. The magnet having the lock mechanism 80 of this embodiment.
The direction of the air disk cartridge 10 is indicated by the insertion direction C.
It is used by being pushed into the magnetic disk drive 6. Magnetism
The disk drive 6 has a protrusion (not shown)
Part) is formed corresponding to the notch 88, this protrusion
The portion of the latch tongue 82 whose part is exposed in the notch 88 is
Press and bend the latch tongue 82 inward of the upper shell 30
The As a result, the engagement between the projection 84 and the notches 85 and 86 is achieved.
The upper shutter 35 and the lower shutter 25 are opened.
It becomes possible to turn to open 34 and 24. Also, the upper shatter
The shutter 35 and the lower shutter 25 are restored and the openings 34 and 24 are returned.
When closing, the slanted surface 84a and the bottom shutter 25
The latch tongue 82 is fixed by the edge 25e of the straight plate portion 25c.
After being deflected inwardly, it returns elastically and the projection 84
Notches 85 and 86 engage. The lock mechanism 80 and the lock machine described above
In the structure 60, the magnetic disk cartridge 10 is a magnetic disk.
By being inserted into the quad drive 6, the shutter 2
The locks 5 and 35 are released. After that, even more magnetic
Insert the disk cartridge 10 into the magnetic disk drive 6
If the insertion is continued, the above-mentioned shutter formed on the shutter 35 will be described.
The cutter operating projection 35d is a magnetic disk (not shown).
Engage with the operating projection of the drive 6 and insert it as it is inserted.
Shutter against the spring force to close the utters 25 and 35
-Operates to open 25 and 35. Next, the upper shutter 35 and the lower shutter
-125 up and down to normally close openings 24 and 34
The shutters 35 and 125 can be energized, FIG.
Explains the shutter urging structure different from the structure shown in
To do. FIG. 9 shows a spring biasing mechanism of the lower shutter 125.
3 is a perspective view of the lower shell 20. FIG. Upper shutter 35 and lower
Since the shutter 125 is combined, the lower shutter
Only 125 will be described. This lower shutter 125
The vertical plate portion 125c, the main plate portion 125b, and the lower shell 20
An annular portion 125a fitted to the annular wall 20c of the
Extending to the opposite side of the main plate 125b across the annular portion 125a
It has a tip-like tapered arm 127. Arm 127
The contact piece 1 formed by bending upward at the tip of
29 is provided. This lower shutter 125 is
It is comprised so that it may rotate around the shape wall 20c. On the other hand, in the corner of the lower shell 20, for example
Ring formed around hole 16 by burring
A linear spring 135 wound in a plane is attached to the wall 133.
It is attached. The annular wall 133 is formed by the lower shell 20.
It may be one long projecting annular wall 133 provided in
In cooperation with the corresponding annular wall of the upper shell 30, ie
You may make a ring wall by contacting
Yes. One end 135a of the linear spring 135 contacts the contact piece 129.
The other end 135b is in contact with the inner surface of the side wall portion 22.
The The linear spring 135 shown in FIG. 9 is elastically biased outward.
The contact piece 129 is always indicated by an arrow 137.
So that it is biased outward. This linear spring 135 is
Raindrop-shaped magnetic disk cartridge
Out of the area occupied by the magnetic disk 14 in the disk 10
Further, it is arranged on the bottom plate 20a indicated by the shade.
Therefore, the function of the magnetic disk 14 is not impaired. With this configuration, the lower shaft is
Since the tutter 125 is always urged in the closing direction,
By combining with the locking mechanisms 60 and 80 described above
Thus, the magnetic disk 14 can be protected more reliably.
The

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 schematic 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 a small magnetic disk cartridge with a shutter opened. FIG. 5 is an exploded perspective view of the small magnetic disk cartridge of FIG. 2. FIG. 6 is used for the small magnetic disk cartridge of the present invention. FIG. 7 is a perspective view of an upper shell, an upper shutter, and a cover plate for explaining a locking mechanism according to the first embodiment. The locking mechanism is shown by arrow A in FIG.
FIG. 8 is a perspective view showing a second lock mechanism used in the small magnetic disk cartridge of the present invention. FIG. 9 is a perspective view of a lower shell showing a spring biasing mechanism of the shutter. 10 is a schematic explanatory view showing a disk drive as a premise of the present invention together with an electronic device having a card slot into which the disk drive is loaded. DESCRIPTION OF SYMBOLS 6 Disk drive 10 Magnetic disk cartridge 12 Housing 14 Magnetic disk 20 Lower shells 21 and 22 Side wall portions 24 and 34 Magnetic head access openings 25 and 35 Shutter 30 Upper shell 64 Latch arm (locking portion) 72 Hole (locked portion) 82 Latch tongue piece (locking portion) 85 and 86 Notch (locked part)

Claims (1)

What is claimed is: 1. A magnetic disk cartridge that can be loaded into a card-type disk drive for an electronic device, wherein the magnetic disk cartridge houses a flexible magnetic disk rotatably in a housing. The housing is spring-biased in a closing direction having an opening for allowing the magnetic head of the card type disk drive to access the surface of the magnetic disk and a locked portion for opening and closing the opening. And a locking portion that locks with the locked portion at a closed position of the shutter that closes the opening, and when the magnetic disk cartridge is inserted into the disk drive, the locking portion is The locking portion and the locked portion of the shutter in cooperation with a corresponding portion corresponding to the locking portion of the magnetic disk drive Small magnetic disk cartridge engagement is characterized by comprising configured to be released.