Note: Descriptions are shown in the official language in which they were submitted.
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2~1~203
TITLE OF THE INVENTION
Disk Cartridge
; BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to disk cartridges, and
particularly to a disk cartridge which is installed in a disk
reproducing apparatus with a disk-like recording medium
~` accommodated therein and the record is read and written in that
` state such as the optical disk cartridge, the photo-magnetic
disk cartridge and the magnetic disk cartridge.
,
Description of the Background Art
. ~
Such kind of conventional disk cartridge has a cover which
can be opened and closed or a tray which can be inserted and
- extracted for accommodating'the disk-like recording medium ~`~
, therein. As such disk cartridges, Japanese Utility Model
~` Publication No. 3-48780 and Japanese Paten-t Laying-Open No.2-
,
123583 are known, for example. Note that the reference numerals
~; enclosed in parentheses in the description of the background art
below are those used in the gazettes cited above.
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The disk cartridge disclosed in the Japanese Utili~y Model
PublicationNo.3-48780includesthequadrilateralmagazineframe
(2) and the lid (1) axially supported on one side thereof. The
~ nail-like lock portion (7) provided on the lid~cooperates with
-~ the lock release operation portion (15) provided on the magazine
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frame (2) to hold the lid (l).in a closed state with respect to
the magazine frame (2). When the disk cartridge is inserted in
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s the reproducing apparatus, the shutter (3) is opened by the
. . ;, .
, operation member provided in the reproducing apparatus and the
information is read.
The disk cartridge disclosed in the Japanese Patent Laying-
~;;
i Open No.2-123583 includes the thin box-like outer case (11)
, . ~ .
-;, having the tray insert hole(13) provided on one side thereof and
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,~ the tray (12) having the disk provision portion (17) to be
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`'' accommodated therein. The tray (12) is pulled out of the outer
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case (11) to a partially overlapping state and then the
information is recorded and reproduced.
The disk cartridge of Japanese Utility Model Publication
.~
1,~ No.3-48780 enables installation of the disk being accommodated
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in the case in the reproducing apparatus, but it has a
disadvantage that a user(especially, a user who is unaccustomed
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to handling it such as a little child) may accidentally open the
lid to make dirt or damage the disk accommodated therein since
the lid can be easily opened and closed.
' The disk cartridge of Japanese Patent Laying-Open No.2-
123583 dose not inoludes a shutter, so that its structure is
~' simple to enable down-sizing of the cartridge itself. However,
the tray is extracted from the outer case in use to require a
space in the drive apparatus correspondingly, so that the entire
apparatus becomes large against its original object of making
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~ the apparatus smaller and thinner. Besides, the tray and the
s case must slide smoothly so that the tray can be easily pulled
out in the drive apparatus, and the spring (16~ which is
energized in the direction of discharging the tray is provided.
;~ Therefore, it can not certainly prevent the tray from flying out
., .
when the locked state is undesirably released to cause the disk
to fall down or to be damaged.
The inventors of the present invention devised the disk
~ ~ .
- cartridge shown in Fig.10 to solve such disadvantages. The disk
cartridge 1 includes the case 2, the tray 3 and the recording
~ disk (not shown). More specifically, the case 2 has its
; sectional shape selected -to be almost U-shaped and has a head
` access hole and a spindle insert hole on its under surface. It
also has a tray insert hole 4 formed on its one side. The tray
` 3has a circular accommodating concave portion for accommodating
` the recording disk therein, and a head access hole and a spindle
insert hole formed in positions which corxespond to the head
. . .
access hole and the spindle insert hole of the case 2, and which
is extractably inserted in the case 2. The recording disk is a
. .,
' medium in and from which the information can be recorded and
.
reproduced such as an optical disk and a magnetic disk, and which
is accommodatedin the accommodating concave portionin the tray
In the disk cartridge 1, the recording disk (not shown) is
; accommodated in the tray 3, and which is installed in the drive
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, apparatus with the tray 3 inserted in the case 2 to write or read
~ the information. Or, the recording disk may be taken ou-t of the
;~ tray 3 to be attached in the drive apparatus by itself.
Elastic members 5 for locking are provided on the right and
~.,.
left sides of the tray 3 being exposed from the case 2. The tray
; 3 is locked in the case 2 by means of the locking means inside
when the tray 3 is inserted in the case 2 to prevent the tray 3
`~ from accidentally getting out of tha case 2. The tray dose not
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~-'; have to be extracted in the drive apparatus since the recording
~` surface is exposedbyopening the shutter inthe drive apparatus.
`~ Accordingly, the tray and the case are in close contact with each
other so that some force is required to extract it. As a result,
the tray can not be easily extracted when the locked state is
~:'
released accidentally.
Now, in the disk cartridge 1 of the background art which has
been previously devised by the inventors of the present
invention (refer to Fig.10), the direction X for extracting the
disk cartridge 1 from the drive apparatus is the same as the
direction Y for extracting the tray 3 from the case 2.
Therefore, when the disk cartridge 1 is extracted from the drive
apparatus, if it is pinched on both sides as shown by the arrow
Z in Fig.9, the locked state of the case 2 and the tray 3 is
released to result in a problem that only the case 2 is left in
the drive apparatus againstthe frictional force working between
the case 2 and the tray 3.
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It also has a disadvantage that, when the tray 3 is taken
:
away from the case 2, the tray 3 is extracted with the recording
disk provided thereon being exposed to possibly cause the disk
to fall off to be damaged, resulting in a problem in writing and
reading oftheinformation. Such disadvantage also existsin the
conventional art (Japanese Paten-t Laying-Open No.2-123583)
described above.
, .
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to
provide a disk cartridge which is compact and has the high
operational reliability in which only a tray is not e~tracted
with a case left in a drive apparatus to prevent a disk from
falling down to be damaged as described above.
The present invention is directed to a disk cartridge which
accommodates a disk-like recording medium therein and is
. , .
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attached to a disk drive apparatus to be used, including: a flat
case having a plane shape being quadrilateral which includes a
tray accommodating space provided therein, and a tray insert
hole provided on one side along a direction of insertion into a
disk drive apparatus; a tray having an accommodation concave
portion for accommodating the disk-like recording medium formed
on one surface thereof and which is insertably and extractably
inserted in the tray accommodating space in the case; first
engagingmeans formed in the case forreleasably lockingthe tray
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being accommodated in the tray accommodating space; and second
engaging meansformed inthe tray in apositionwhichcorresponds
; to the first engaging means. The direction of insertion or
extraction of the tray into and from the case is selected to be
perpendicular to the direction of insertion or extraction of the
,
1 disk cartridge into and from the disk drive apparatus.
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,' In the present invention, as described above, the insertion
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:,~ and extraction direction of the tray into and out of the case is
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~i, perpendicular to the direction of insertion and extraction of
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; the disk cartridge into and out ofthedrive apparatus, therefore
;;,i, such a disadvantage that the lock is accidentally released when
extrac~ing the disk cartridge from the drive apparatus to allow
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the case to be left in the drive apparatus, or to allow the disk
to be extracted in an exposed state to be damaged on its
reco ding surface canbe solved, and the operational reliability
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can be improved.
These and other objects, features, aspects and advantages of
the present invention will become more apparent from the
' following detailed description of the present invention when
taken in conjunction with the accompanying drawings.
,~
BRIEF DESCRIPTION OF THE DRAWINGS
¦ Fig.1 is aperspectiveview of adisk cartridge 100 according
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to an embodiment of the preset invention;
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Fig.2 is a perspective view seen from the bottom surface of
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the embodiment of Fig.1;
Fig.3 is an exploded perspective view of the embodiment of
Fig.l;
~;Fig.4 is a partial section view showing a recording disk 106
before clamping in the embodiment of Fig.1;
Fig.5 is a partial section view showing the recording disk
106 being clamped in the embodiment of Fig.l:
Fig.6 is a partial section view showing the second shutter
141 being supported in the embodiment of Fig.l;
Fig.7 is an enlarged plan view in the vicinity ofthe locking
projection 135 in the embodiment of Fig.1:
~ .:
Fig.8 is an enlarged section view in the vicinity of the
` locking projection 135 in the embodiment of Fig.l;
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Fig.9 is a perspective view of a disk cartridge 200 of
~`another embodiment of the present invention; and
Fig.10 is a plan view of a dis~ cartridge 1 which is the
background art of the present invention.
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DESCRIPTION OF THE PREFERRED EMBODIMENT
; Fig.1 and Fig.2 are diagrams illustrating the outline of a
disk cartridge 100 of an embodiment of the present invention,
` where Fig.1 is a perspective view seen from above and Fig.2 is a
perspective view seem from below.
~ Next, referring to Fig.1 and Fig.2, the outline of the disk
,-~ cartridge 100 will be described. In Fig.1, the disk cartridge
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~ 100 of the present invention includes a case 101. The case 101
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has an upper half 110 and a lower half 120 made of synthetic
~ resin. Aninset directiondisplay portionlll fordisplaying the
; direction of the insertion of the disk cartridge in-to the drive
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,' apparatus is formed on the upper surface of the upper half 110.
A tray insert hole 102 is formed on one side of the case 101, so
.,
that the sectional shape of the case 101 is almost U-shaped.
Tray locking holes 112 for locking are provided in two separated
!, positions on the right and left along a side in the vicinity of
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the tray insert hole 102.
A tray 130 which is inserted in and extracted from the case
101 is made of a synthetic resin material, for example, which has
a circular accommodation concave portion 131 for accommodating
~' the recording disk formed nearly at the center on the upper
surface, and a tray side head access hole 13Z (refer to Fig.3)
and a tray side spindle insert hole 133 continuously formed in
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positions corresponding to a case side head access hole 121 and
a case side spindle insert hole 122 (refer to Fig.2). It also
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has elastic members 134 which correspond to the tray locking
holes 112 and are formed in separated two positions on the right
and left in this side on the upper surface of the tray 130. The
elastic member 134 has a slit 136 to be displaced when pressed in
the direction of the arrow Z to have the elastic force. Locking
projections 135 are formed on the upper surfaces of the elastic
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`'~'! members 134, respectively. When the tray 130 is inserted in the
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case 101, the locking projections 135 fit in the tray locking
holes 112 to lock the tray 130 in the case 101 to prevent the tray
from getting out of it.
In the lower half 120, the case side head access hole 121 and
. . .
the case side spindle insert hole 122 are continuously formed as
shown in Fig.2. Furthermore, a printed board 150 having external
memory elements (not shown) and the like is provided in the lower
half 120, and a contact terminal 151 is provided in a
predetermined position on the lower surface of the printed board
150.
The disk-like recording medium (referred to as "a recording
disk", hereinafter) 160 such as an optical disk is insertably and
extractably accommodated in the accommodation concave portion
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~3,~ 131 of the tray 130. The disk cartridge 100 is formed so that the
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'.~ pressed direction Z of the elastic members 134 for the locking
is the same as the direction of the thickness of the disk
~ cartridge 100, and the direction Y' of the insertion and the
-', extraction of the tray 130 into and from the case lOl is
perpendicular to the direction X' of the insertion and the
`, extraction of the disk cartridge 100 into and from the drive
`' apparats. `
~, The disk cartridge lOO can be installed in the drive~3
apparatus with the recording diSk 160 being accommodated in the
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:~ tray 130 and which tray 130 being inserted and locked in the case
lOl. Or, depending on the structure of the drive apparatus, the
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'~"3! recording disk 160 can be installed in the drive apparatus by
itself after extracting the tray 130 from the case 101 after
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releasing the lock to the case 101 by pressing the elastic embers
~, 134 in the pressed direction Z and then taking out the recording
`~ disk 160 from the tray 130.
;,~, Fig.3 through Fig.8 are diagrams illustrating the disk
cartridge 100 in detail, where Fig.3 is an exploded perspective
view of the disk cartridge, Fig.4 is a partial sectional view
showing the information recording disk before clamping, Fig. 5
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~' is a partial section view showing the information recording disk
. .
being clamped, Fig.6is apartial sectionalview showing asecond
shutter being supported, Fig.7 is an enlarged plan view in the
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vicinity of the locking projection, and Fig.8 is an enlarged
sectional view in the vicinity of the locking projection.
~, Next, referring to Fig.3 through Fig.8, the disk cartridge
100 will be described in detail. In Fig.3, a circular opening
113 which is larger than the spindle insert hole of the recording
disk 160 is formed nearly at the center on the upper half 110.
~`
A step portion 116 is formed in the opening 113, which rotatably
supports a clamper 115 (refer to fig.4). A cover plate 114 is
fixed to the opening 113 by means of appropriate means such as
welding so that the clamper 115 dose not fall off.
When it is not usod, the recording disk 160 is accommodated
and supported in the tray 130 and the clamper 115 is supported on
the step portion 116 by means of self-weight as shown in Fig.4.
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2~203
- When the disk cartridge 100 is attached to the drive
apparatus, a first shutter 140 automatically slides by means of
a shutter open pin (not shown) provided in the drive apparatus
to open the case side head access hole 121 and the case side
spindle insert hole 122 formed in the lower half 120, and the
tray side head access hole 132 and the tray side spindle insert
hole 133. Then, a spindle 170 is inserted and the center portion
of the recording disk 160 is elastically sandwiched between the
spindle 170 and the clamper 115.
The two elastic members 134 are provided at a certain
;. interval in the vicinity of the handle potion 137 of the tray
130, and the locking projections 135 are formed facing upwards
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~ on free ends of the elastic members 134. The slits 136 which are
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almost U-shaped are formed around the elastic members 134, which
are displaced when the elastic members 134 are pressed downwards
~ to have the elastic force (refer to Figs.7 and 8). Tray locking
holes 112 are formed in the positions facing to the locking
projections 135 in the upper half 110. ~
~y Accordingly, when the elastic members 134 are not pressed, :
as shown in fig.8, the elastic members 134 are in a parallel
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~ state with thelocking projections 135beinginsertedinthe tray
:~ locking holes 112 in the upper half 110 to engage with the tray
~ locking holes 112, where the tray 130 can not be extracted from
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the case 101, that is, it is in the locked state.
When extracting the tray 130, a user pulls the tray 130 to
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this side while pressing the elastic members 134 with right and
left thumbs in the direction of the arrow Z (the direction of the
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3 thickness of the case 101) to release the engagement between the
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' locking projections135 andthe tray locking holes112 to e~tract
;i~ it from the case 101. Then, the recording disk 160 can be
individually taken out. Accordingly, even a child having small
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hands can insert and extract the tray 130 with ease.
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; A terminal hole 152 is formed in a position facing to a
contact terminal 151 in the lo~er half 120 (refer to Fig.2). The
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terminal hole 152 is opened and closed by a second shutter 141 as
~l shown in Fig.3. The second shutter 141 and the first shutter 140
.~
can slide in the same direction on a guide wall 123 formed inside
the case 101 (refer to Fig.4 and Fig.6), where both the shutters
140 and 141 are elastically energized in the closing direction
by a single spring 142. In the description, the second shutter
141 is shown being slid to open the terminal hole 152 in Fig.2.
. ,;
That is to say, when the disk cartridge 100 is not used, the
terminal hole 152 is closed by the second shutter 141.
A cell holder 154 is inserted together with a cell 155 into
. . ~ ,
a frame 153 provided on the printed board 150 by pushing in from
the side of the lower half 120 with the button type cell 155
~, accommodated therein.
~;~ Although the description has been made on the case in which
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~! the opened tray locking hole 112 is provided in this embodiment,
a concave may be formed in place of the hole. Furthermore, an
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projection may be formed in the case 101 and a tray locking hole
or concave may be formed on the elastic member 134.
Furthermore, although the engaging means including the tray
locking holes 112 and the elastic members 134 are provided on the
right and left sides in this embodiment, a set of engaging means
may be provided at nearly the center in the direction X' of the
insertion and the e~traction of the disk cartridge into and from
the disk drive apparatus with a larger interval between the
accommodation concave portion 131 in the tray 130 and the handle
portion 137.
In this embodiment, thedescription has beenmade on the case
in which the engaging means is formed in the vicinity of the tray
insert hole 102, but it can be formed anywhere as long as it dose
not hinder the rotation of the recording disk 160 and the
opening/closing of the first and second shutters.
Fig.9 is a diagram showing another embodiment ofthe present
invention. A disk cartridge 200 in this embodiment includes an
upper half 210, a lower half 220, a recording disk 160, a tray
230 and the like as in the embodiment shown in Fig.l and Fig.2.
In this embodiment, tray locking holes 212 are formed on both
outer sides in the vicinity of a tray insert hoIe 202 in the case
201. The tray 230 has elastic members 234 provided on the right
and left sides in this side, which have slits 236 so that they
are displaced when being pressed in the direction of the arrow
Z' to have the elastic force; Locking projections 235 are
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~ provided on sides of the elastic members 234, respectively,
where the tray 230 is inserted into the case 201 so that the
locking projections 235 fit in the tray locking holes 212 to
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/ cause the tray 230 to be locked in the case 201 to prevent -the
,~ tray 230 from getting off.
~1 . . .
When extracting the tray 230, the user can extract the tray
230 out of the case 201 by pulling the tray 230 in this side while
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pressing the elastic members 234 on-~he right and left sides in
~,3 the center (the arrow Z') direction with a thumb and a
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`~ forefinger, or a middle finger in one hand to release the
l engagement between the locking projections 235 and the tray
~, locking holes 212. Then, the recording disk 160 accommodated
`'
therein can be taken out individually. Accordingly, a user
having large hands can insert and discharge the tray 230 with a
single hand.
In this embodiment, the direction Y' of the insertion and the
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`~ extraction of the tray 230 into and from the case is also
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~ perpendicular to the direction X' of the insertion and the
:.,
extraction of the disk cartridge 200 into and from the drive
apparatus as in the embodiment of Fig.l and Fig.2. Furthermore,
in this embodiment, the pressed direction Z~ of the elastic
.
members 234 is the same as the direction X' of the insertion and
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`l the extraction into and from the drive apparatus.
`/; In this embodiment, a concave may also be formed in place of
`~ the opened tray locking hole 212 as in the embodiment of Fig.1
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and Fig.2. Also, projections may be formed on the case 201 and
tray locking holes or concaves may be formed on the elastic
members 234.
; Furthermore, as another embodiment, the structure can be
adopted in which a sliding member is provided on the handle of
the tray and a part of the sliding member engages with engaging
means formed on the case to detachably lock the tray and the
case. In this embodiment, as in the two embodiments described
above, the direction of the insertion and the extraction of the
tray into and from the case is selected to be perpendicular to
the direction of the insertion and the extraction of the disk
: `~! . .
~ cartridge into and from the drive apparatus.
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;~;j In the present invention, as described above, the direction
of insertion and extraction of the tray into and from the case is
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i perpendicular to the direction of insertion and extraction of
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`~, the diskcartridge intoand fromthe drive apparatus. Therefore,
the problems in which a lock is accidentally released when
extracting the disk cartridge from the drive apparatus to cause
-the case to be left in the drive apparatus, or to cause the
~¦ recording disk to be extracted being exposed so that the
~;~ recording surface is damaged can be solved to improve thè
;, operational reliability.
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, Furthermore, the tray can not be extracted unless it is
-~ pulled with the engaging members pressed in the direction of
~ releasing the lock, so that the tray is not accidentally
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.J~ ' extracted. This prevents the user from erroneously taking out
` the recording disk, or the recording disk from flying out when
the disk cartridge falls down. As a result, the recording disk
~ can be prevented from being contaminated or damaged to prevent
;l errors in data reading due to damage of the recording disk.
While the lnvention has been shown and described in detail,
the foregoing description is in all aspects illustrative and not
restrictive. It is therefore understood that numerous
modifications and variations can be devised without departing
' from the scope of the invention.
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