Information
-
Patent Grant
-
6826767
-
Patent Number
6,826,767
-
Date Filed
Monday, January 7, 200222 years ago
-
Date Issued
Tuesday, November 30, 200419 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Westerman, Hattori, Daniels & Adrian, LLP
-
CPC
-
US Classifications
Field of Search
US
- 369 291
- 369 7721
- 369 7711
- 369 7511
- 360 9908
- 360 9912
- 360 133
- 720 630
- 720 738
-
International Classifications
-
Abstract
A cartridge has a shutter movable forward and rearward for exposing or alternatively enclosing a disk contained in a shell. The shell is inserted into a device provided with a tooth for opening the shutter and a spring piece fittable to the shutter and positioned at a level different from that of the tooth. The shell has a slit formed in a side face thereof in the vicinity of the shutter for permitting the tooth to advance thereinto. The shell has a corner in the vicinity of the slit and providing a contact face. The slit is provided at a front end portion thereof with a guide groove positioned in the contact face and enlarging toward the front. The contact face is in the form of a circular arc or slope and so shaped that the path of movement thereof intersects the inner end of the tooth at a location B which is positioned forwardly of a position A where the path of movement intersects the spring piece.
Description
TECHNICAL FIELD
The present invention relates to cartridges containing disks and signal recording or reproduction devices for the disk.
BACKGROUND ART
FIG. 10
is a perspective view of a conventional cartridge
6
[see JP-B No. 7-36261(1995)]. The cartridge
6
comprises a flat shell
9
containing a disk
60
. The shell
6
has a side face provided with a slit
5
. In the vicinity of the slit
5
, the shell
9
has an aperture
63
formed in the upper wall thereof for exposing the disk
60
. A shutter
61
is provided over the aperture
63
and the slit
5
. A fitting hole
62
is formed in a side wall of the shutter
61
. The shutter
61
is held closed by a lock claw (not shown) within the shell
9
.
The cartridge
6
is inserted into a holder
2
pivoted to a chassis
1
. Provided inside the holder
2
is a tooth
31
movable into the slit
5
and a spring piece
37
fittable into the fitting hole
62
in the shutter
61
. The tooth
31
has an inner end positioned inwardly of the spring piece
37
. When the cartridge
6
is inserted into the holder
2
, the shutter
61
moves past the spring piece
37
and comes into contact with one end of the tooth
31
. The tooth
31
releases the lock claw from the shutter and pushes the shutter
61
open. When the holder
2
is lowered toward the chassis
1
in this state, signals can be recorded or reproduced. In the following description, the direction in which the cartridge
6
is inserted into the holder
2
will be referred to as the “front,” and the opposite direction as the “rear.”
FIG. 11
is a view in section of the holder
2
with the cartridge
6
inserted therein as the holder is seen from the direction of arrow A in FIG.
10
. When the cartridge
6
is to be unloaded from the state shown in
FIG. 11
, the cartridge
6
is manually pulled out of the holder
2
in a raised state. Since the spring piece
37
is fitting to the shutter
61
, the shutter
61
is closed when the cartridge
6
is pulled out. When the cartridge
6
is further pulled out with the shutter
61
closed, the shutter
61
is released from the spring piece
37
fitting thereto, and the cartridge
6
is unloaded from the holder.
FIG. 12
is a side elevation showing the levels of the slit
5
of the cartridge
6
, the spring piece
37
and the tooth
31
. For convenience of description, the tooth
31
is shown as brought closer to the spring piece
37
. The fitting hole
62
of the shutter
61
is positioned at the approximate midportion of thickness of the cartridge
6
, and the spring piece
37
is positioned at a level corresponding to the hole
62
. The slit
5
is positioned slightly upwardly of the approximate midportion of thickness of the cartridge
6
, while the tooth
31
is positioned at a level corresponding to the slit
5
. The slit
5
is positioned as shifted from the approximate midportion of thickness of the cartridge
6
, so that when the cartridge
6
is inserted as turned upside down in error, the tooth
31
fails to fit into the slit
5
. This obviates the likelihood that the cartridge
6
will be erroneously inserted as turned upside down.
The slit
5
comprises a horizontal groove
51
extending forward, and a guide groove
50
continuously extending from the front end of the horizontal groove
51
and enlarging toward the front. The provision of the guide groove
50
renders the tooth
31
fittable into the slit
5
easily. The lower end of the spring piece
37
is positioned downwardly of the lower edge of the horizontal grooved portion
51
, such that when the cartridge
6
is inserted toward the spring piece
37
, the spring piece
37
moves as opposed to the lower side edge of the horizontal grooved portion
51
.
However, the construction described above has the following problem to be solved.
It is likely that the cartridge
6
will be inserted into the holder
2
while backlashing upward and downward. The spring piece
37
is then likely to move into the slit
5
through the guide groove
50
as if wedging into the guide groove
50
of the slit
5
, possibly making the cartridge
6
unable to further move into the holder.
This problem may be solved by decreasing the size of the front opening of the guide groove
50
, whereas this conversely makes it difficult for the tooth
31
to enter the slit
5
.
While conducting studies on countermeasures against this problem, the present applicant directed attention to the fact that when the cartridge
6
is inserted into the holder
2
while allowing the cartridge to backlash up and down, both the spring piece
37
and the tooth
31
enter the slit
5
through the front opening of the guide groove
50
. In other words, the applicant noticed that if the spring piece
37
comes into contact with the upper or lower end of the horizontal grooved portion
51
at the side portion of the cartridge
6
without fitting into the guide groove
50
even if the cartridge
6
backlashes up and down, the spring piece
37
encounters difficulty in entering the slit
5
since the horizontal groove
51
has a smaller width than the front opening of the guide groove
50
.
An object of the present invention is to make it difficult for the spring piece to enter the slit by a simple construction.
DISCLOSURE OF THE INVENTION
A shell
9
has a corner in the vicinity of a slit
5
and providing a contact face
90
. The slit
5
is provided at a front end portion thereof with a guide groove
50
positioned in the contact face
90
and enlarging toward the front.
The contact face
90
is in the form of a circular arc or slope and so shaped that the path of movement thereof intersects a spring piece
37
at a location A which is positioned rearwardly of a position B where the path of movement intersects the inner end of a tooth
31
.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is an exploded perspective view of a disk recording or reproduction device;
FIG. 2
is an exploded perspective view of a holder and a slide member;
FIG. 3
is a perspective view of a cartridge proposed by the present applicant;
FIGS. 4A
,
4
B are side elevations of the holder in a raised position,
FIG. 4A
showing the holder before being loaded with the cartridge,
FIG. 4B
showing the holder with the cartridge inserted therein completely;
FIGS. 5A
,
5
B are views showing the holder of
FIGS. 4A
,
4
B, respectively, as it is seen from the direction A;
FIGS. 6A
,
6
B are sectional views of the same,
FIG. 6A
showing the holder with the cartridge inserted therein completely,
FIG. 6B
showing the same with a shutter opened;
FIGS. 7A
,
7
B are side elevations in section,
FIG. 7A
showing a projection as positioned in an aperture,
FIG. 7B
showing the projection as positioned on the cartridge;
FIG. 8
is a side elevation showing the levels of a slit in the cartridge, a spring piece and a tooth;
FIG. 9
is a plan view of
FIG. 8
;
FIG. 10
is a perspective view of conventional cartridge and holder;
FIG. 11
is a plan view in section of the holder with the cartridge accommodated therein; and
FIG. 12
is a side elevation showing the levels of a slit in the cartridge, a spring piece and a tooth of the prior art.
BEST MODE OF CARRYING OUT THE INVENTION
With reference to the drawings, an embodiment of the present invention will be described below in detail.
[General Description of Cartridge]
FIG. 3
is a perspective view of a cartridge
6
proposed by the present applicant. The cartridge
6
comprises a flat shell
9
containing a disk
60
. The shell
9
has a side face having a slit
5
and an upper wall provided with a recessed portion
65
. An aperture
63
is formed in the recessed portion
65
for exposing the disk
60
. A shutter
61
for covering the aperture
63
is slidably disposed in the recessed portion
65
and fitted over the slit
5
. A fitting hole
62
is formed in a side wall of the shutter
61
. The upper surface of the shutter
61
is positioned in the same plane as the upper surface of the shell
9
. The shutter
61
is biased toward a closing direction by a torsion spring
66
within the shell
9
and is automatically closed even if opened inadvertently. A caved portion
64
is formed in the bottom wall of the cartridge
6
. A slide member
3
is engageable in the caved portion
64
as will be described later. With the shutter
61
opened, the disk
60
within the shell
9
is partly exposed to record signals thereon or reproduce signals therefrom.
The shell
9
has a front end corner which is chamfered and thereby provided with a circular-arc contact face
90
. The slit
5
has a front end positioned in the contact face
90
to provide a guide groove
50
enlarging toward the front.
The present embodiment is characterized in that the position B where a tooth
31
for opening the shutter
61
comes into contact with the contact face
90
as will be described later is shifted forwardly of the position A where a spring piece
37
fittable to the shutter
61
comes into contact with the contact face
90
(see FIG.
9
). A description will be given first of the construction of the device to be loaded with the cartridge
6
and the insertion of the cartridge into the device.
[Overall Construction of the Device]
FIG. 1
is an exploded perspective view of the recording or reproduction device for disks. A holder
2
is pivoted as at
25
at one end thereof to a chassis
1
provided with a pickup
72
, and the cartridge
6
is inserted into the holder
2
. The pickup
72
is movable toward or away from a turntable
73
. A bracket
71
is attached to bottom face of the pickup
72
. A head lever
7
provided with a recording head
70
at an outer end thereof is pivoted at a base end thereof to the bracket
71
. The head lever
7
is advanced by a lift mechanism (not shown) into the holder
2
through an opening
26
formed in an upper wall of the holder
2
. Provided on the inner surface of the upper wall of the holder
2
is a projection
69
to be brought into contact with the upper surface of the cartridge
6
. As will be described later, this projection
69
is one of the features of the invention. The recording head
70
is brought into contact with the disk
60
within the cartridge
6
to record signals thereon as is known well.
Release means
10
having a projecting upper plate
11
is provided at one corner of front end of the chassis
1
. The release means
10
disengages the cartridge
6
from the holder
2
when the holder
2
as lowered is raised.
The holder
2
has a bearing plate
27
inwardly projecting from the lower end of a side plate thereof. The bottom wall of the cartridge
6
is placed on the support plate
27
. Extending outward from the lower end of a side portion of the holder
2
is a support plate
20
for supporting thereon the slide member
3
.
FIG. 2
is an exploded perspective view of the holder
2
and the slide member
3
. The slide member
3
comprises an overlaid plate
34
having a vertical plate
35
extending upward from a side portion thereof. Slits
33
are formed in the over laid plate
34
. The slits
33
have fitted therein pins
28
projecting from the support plate
20
, rendering the slide member
3
movable in the cartridge inserting and unloading directions. The pin
28
is a stepped pin comprising a small-diameter shank
28
b
and a flange
28
a
formed at the top end thereof. The slots
33
in the slide member
3
are each enlarged at one end to provide a large hole
33
a
having a slightly larger diameter than the flange
28
a.
The slide member
3
is mounted on the support plate
20
by positioning each large hole
33
a
in register with the flange
28
a
and thereafter moving the slide member
3
rearward. The flanges
28
a
prevent the slide member
3
from slipping off.
A restraining piece
85
extends outward beyond an upper edge of an apertured portion
21
of the holder
2
, and the vertical plate
35
of the slide member
3
is positioned inwardly of the restraining piece
85
. The slide member
3
is prevented from backlashing outward by the restraining piece
85
.
A lock slide
4
is disposed above the slide member
3
. The lock slide
4
is provided with slits
44
,
44
having fitted therein pins
29
,
29
projecting from the upper wall of the holder
2
, whereby the lock slide
4
is made movable in the cartridge inserting and unloading directions.
The slide member
3
is made from a metal plate by bending and is in the form of an integral piece comprising a tooth
31
projecting inward from the rear end of the vertical plate
35
, a projection
32
extending upward from the approximate midportion of length of the vertical plate
35
, a latch
30
positioned at the front end of the vertical plate
35
and having an inwardly projecting end, and a spring piece
37
extending rearward from the rear end of the vertical plate
35
. The tooth
31
advances into the holder
2
to come into contact with an end face of the shutter
61
, and the spring piece
37
is fittable into the hole
62
of the shutter
61
. The tooth
31
and the spring piece
37
are movable in the cartridge inserting and unloading directions unlike those of the prior art.
The lock slide
4
is formed from a metal plate by bending and integrally has an engaging hook
40
extending from the lengthwise midportion thereof toward its front end, and a spring retainer
42
projecting outward from the approximate midportion of length thereof. The engaging hook
40
is elastically deformable downward and has a slope
43
at its outer end. A push plate
41
extends outward from the hook
40
in the vicinity of its base end.
The holder
2
shown in
FIG. 2
has the aperture
21
for the tooth
31
to move in and a hole
22
positioned forwardly of the aperture
21
. The latch
30
fits into the hole
22
, with the cartridge
6
inserted into the holder
2
completely. A lug
23
with which the hook
40
is engageable projects outward from the holder
2
above the hole
22
.
A hook
24
is provided on the holder
2
at the rear end thereof. The lock slide
4
is biased rearward by a tension spring
8
engaged with the hook
24
and the spring retainer
42
of the lock slide
4
. The contact of the front ends of the slit portions
44
with the pins
29
restrains the lock slide
4
from moving rearward. The projection
32
of the slide member
3
bears on the rear side of the spring retainer
42
, permitting the lock slide
4
to bias the slide member
3
rearward by virtue of the bearing contact. The biasing force of the tension spring
8
is greater than the shutter biasing force of the torsion spring
66
inside the cartridge
6
.
The cartridge
6
is inserted into the holder
2
as pivotally moved upward. Signals are recorded or reproduced, with the cartridge
6
positioned as opposed to the chassis
1
by the downward pivotal movement of the holder
2
. The head lever
7
will not be described below for convenience of description.
FIGS. 4A
,
4
B are side elevations of the holder
2
in a raised position,
FIG. 4A
showing the holder before being loaded with the cartridge
6
,
FIG. 4B
showing the holder with the cartridge
6
inserted therein completely. Before the cartridge
6
is inserted, the slope
43
of the engaging hook
40
is positioned in the rear of the lug
23
. The latch
30
is positioned in the rear of the hole
22
in the holder
2
.
A description will be given below of the insertion of the cartridge
6
.
[Inserting the Cartridge]
FIGS. 5A
,
5
B and
FIGS. 6A
,
6
B are sectional views of the holder
2
of
FIG. 4A
as it is seen from the direction A. For convenience of illustration, the cartridge is inserted in the upward direction in the illustration. The lock slide
4
and the tension spring
8
are not shown in
FIGS. 5A
,
5
B,
6
A,
6
B.
When the cartridge
6
is inserted into the holder
2
from the state shown in
FIG. 5A
, the tooth
31
of the slide member
3
fits into the slit
5
of the cartridge
6
and comes into contact with the shutter
61
. Since the force of the tension spring
8
biasing the slide member
3
rearward is greater than the force of the torsion spring
66
of the cartridge
6
, the slide member
3
remains unmoved as seen in
FIG. 5B
even if the cartridge
6
is pushed. The shutter
61
is opened against the torsion spring
66
.
When the shutter
61
is opened completely, the shutter
61
is brought into contact with the rear edge of the recessed portion
65
as seen in FIG.
6
B. The latch
30
does not reach the hole
22
since the slide member
3
remains unmoved. The projection
69
of the holder
2
is in contact with the upper surface of the cartridge (see FIG.
7
B). The cartridge
6
is inserted into the holder
2
with slight friction given by contact with the projection
69
, whereby the holder
2
is prevented form backlashing upward and downward.
The cartridge
6
is further pushed in. The shutter
61
, which does not open further, pushes the tooth
31
of the slide member
3
, advancing the slide member
3
to fit the latch
30
into the hole
22
as seen in FIG.
6
A. The latch
30
inserted through the hole
22
lightly engages in the caved portion
64
of the cartridge
6
, holding the cartridge
6
completely inserted in the holder.
On the other hand, the projection
32
of the slide member
3
shown in
FIG. 4A
is in contact with the spring retainer
42
of the lock slide
4
, so that the lock slide
4
advances against the tension spring
8
when the slide member
3
is pushed. The slope
43
of the engaging hook
40
in the state shown in
FIG. 4A
comes into contact with the lug
23
, whereby the hook
40
is deformed by deflection. Upon the slope
43
moving past the lug
23
, the engaging hook
40
restores itself elastically, coming into engagement with the lug
23
as shown in FIG.
4
B.
At this time, the projection
69
of the holder
2
is positioned within the aperture
63
(see FIG.
7
A). Thus, the projection
69
is held out of contact with the cartridge
6
which is completely loaded in the holder
2
.
If the projection
69
were in contact with the upper surface of the cartridge
6
when the cartridge
6
is completely loaded in the holder
2
, there would be an increased frictional force between the cartridge
6
and the holder
2
. When to be unloaded, the cartridge
6
needs to be moved against the force of static friction between the cartridge
6
and the holder
2
, necessitating a greater force for unloading the cartridge
6
. With the present embodiment, however, the projection
69
is positioned within the aperture
63
and is unlikely to increase the force of static friction between the cartridge
6
and the holder
2
. In other words, the cartridge
6
comes into contact with the projection
69
during movement in the unloading direction and is therefore unloaded against a force of dynamic friction between the cartridge
6
and the projection
69
. Since the force of dynamic friction is generally smaller than the force of static friction, the load acting on the cartridge
6
to be unloaded is diminished.
Further if the projection
69
is always in contact with the upper surface of the cartridge
6
, the inside thickness of the holder
2
is the thickness of the cartridge
6
plus the height of the projection
69
. With the present embodiment, however, the projection
69
is positioned within the aperture
63
on completion of loading of the cartridge
6
into the holder
2
, so that the inside thickness of the holder
2
can be smaller.
With the cartridge
6
completely loaded in the holder
2
, the projection
69
may be positioned between the aperture
63
and the shutter
61
. This is functionally equivalent to the above case.
When the engaging hook
40
is engaged with the lug
23
as shown in
FIG. 4B
, the lock slide
4
is restrained from moving in the cartridge unloading direction, and the cartridge
6
is held engaged by the latch
30
. With the latch
30
fitting in the hole
22
of the holder
2
, the slide member
3
is unlikely to move in the direction of unloading from the holder
2
inadvertently.
When the holder
2
is lowered from this state, signals can be recorded or reproduced. When the holder
2
as lowered is raised, the engaging hook
40
is disengaged from the lug
23
by the release means
10
for unloading the cartridge
6
. A detailed description of this movement will not be given.
[Preventing the Spring Piece from Entering the Slit]
The present embodiment is characterized by reducing the likelihood of the spring piece
37
entering the slit
5
.
FIG. 8
is a side elevation showing the levels of the slit
5
of the cartridge
6
, the spring piece
37
and the tooth
31
, and
FIG. 9
is a plan view of the same. For convenience of description, the tooth
31
is shown as positioned close to the spring piece
37
. The fitting hole
62
in the shutter
61
shown in
FIG. 8
is formed at the approximate midportion of thickness of the cartridge
6
, and the spring piece
37
is positioned at a level corresponding to the fitting hole
62
. The slit
5
is positioned slightly upwardly of the approximate midportion of thickness of the cartridge
6
. The tooth
31
is positioned at a level corresponding to the slit
5
. The slit
5
is formed at a position slightly shifted from the approximate midportion of thickness of the cartridge
6
to prevent the cartridge
6
from being inserted erroneously as turned upside down.
The slit
5
provides the guide groove
50
extending from the front end of a horizontal groove
51
and enlarging toward the front. The guide groove
50
is formed over the entire area of the contact face
90
which is in the form of a circular arc as previously stated. The groove
50
therefore extends forwardly inward. The spring piece
37
is fittable into the fitting hole
62
in the side wall of the shutter
61
, while the tooth
31
is brought into contact with the end face of the shutter
61
, so that the inner end of the tooth
31
is positioned inwardly of the portion of the spring piece
37
fitting in the hole
62
.
As shown in
FIG. 9
, accordingly, the location B where the path of movement of the contact face
90
intersects the inner end of the tooth
31
is positioned inwardly of the location A where the path of movement intersects the spring piece
37
. Since the contact face
90
extends forwardly inward in the form of a circular arc, the location B is positioned forwardly of the location A. Because the guide groove
50
enlarges toward the front, the width H
1
of the guide groove
50
at the location A is smaller than the width H
2
of the groove
50
at the location B as seen in FIG.
8
. Accordingly, the width of the guide groove
50
at the location A where the spring piece
37
comes into contact with the contact face
90
is smaller than the width of the front opening of the groove
50
. This diminishes the likelihood of the spring piece
37
fitting into the slit
5
in error, further permitting the tooth
31
to fit into the slit
5
with increased freedom.
Indicated in a chain line in
FIG. 8
is the lower edge of guide groove
50
in the conventional cartridge shown in FIG.
12
. With the slit
5
of the present embodiment, the lower edge of the horizontal groove
51
is made longer than in the prior art toward the front to thereby reduce the likelihood of the spring piece
37
erroneously fitting into the slit
5
. Especially the likelihood of the spring piece
37
erroneously fitting into the slit
5
can be minimized by elongating the lower edge of the horizontal groove
51
to the vicinity of the location A.
Although positioned upwardly of the midportion of width of the cartridge
6
, the slit
5
may be positioned downwardly of the midportion. The tooth
31
is then positioned at a level corresponding to the position of the slit
5
.
Further although made in the form of a circular arc bulging outward, the contact face
90
may be in the form of a slope (not shown) extending from the location A of
FIG. 9
to the location B.
INDUSTRIAL APPLICABILITY
The cartridge
6
is inserted toward the tooth
31
. Since the inner end of the tooth
31
is opposed to the location B on the contact face
90
as shown in
FIGS. 8 and 9
, the tooth
31
advances into the guide groove
50
at the location B.
On the other hand, the spring piece
37
comes into contact with the contact face
90
at the location A which is to the rear of the location B. The guide groove
50
is enlarged toward the front and therefore has a smaller width at a rear position than at a front position. Accordingly, the guide groove
50
has a smaller width at the location A than at the location B, consequently reducing the likelihood of the spring piece
37
fitting into the slit
5
in error owing to a backlash of the cartridge
6
.
Furthermore, the cartridge
6
has the contact face
90
at its corner for reducing the likelihood of the spring piece
37
fitting into the slit
5
. The conventional problem can be solved by a simple construction.
Claims
- 1. A cartridge having a shutter (61) movable forward and rearward for exposing or alternatively enclosing a disk (60) contained in a shell (9), the shell (9) being insertable into a device provided with a tooth (31) for opening the shutter (61) and a spring piece (37) fittable to the shutter (61) and positioned at a level different from that of the tooth (31), the tooth (31) having an inner end positioned inwardly of the spring piece (37), the shell (9) having a slit (5) formed in a side face thereof in the vicinity of the shutter (61) for permitting the tooth (31) to advance thereinto, the cartridge being characterized in that:the shell (9) has a corner in the vicinity of the slit (5) and providing a contact face (90), the slit (5) being provided at a front end portion thereof with a guide groove (50) positioned in the contact face (90) and enlarging toward the front, the contact face (90) being in the form of a circular arc or slope and so shaped that when the shell (9) is inserted into the device, the contact face (90) comes into contact with the inner end of the tooth (31) at a location B which is positioned forwardly of a position A where the contact face (90) comes into contact with the spring piece (37), a horizontal groove (51) of the slit (5) having a lower end portion extending to the vicinity of the location A, the guide groove (50) enlarging toward the front and being provided forwardly of the vicinity of the location A.
- 2. A recording or reproduction device for disks having a holder permitting insertion of a cartridge comprising a shell having an aperture for exposing the disk and a shutter provided on the shell, and a tooth disposed inside the holder for opening the shutter with the insertion of the cartridge,the recording or reproduction device being characterized in that a projection adapted to come into contact with an upper surface of the cartridge is provided on the holder inside thereof, the projection being positioned in the aperture exposed by the shutter as opened or between the aperture and the shutter when the cartridge is inserted in the holder.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11/194128 |
Jul 1999 |
JP |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP00/04386 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO01/04899 |
1/18/2001 |
WO |
A |
Foreign Referenced Citations (7)
Number |
Date |
Country |
63-229659 |
Sep 1988 |
JP |
7-226000 |
Aug 1995 |
JP |
9-282766 |
Oct 1997 |
JP |
10-228705 |
Aug 1998 |
JP |
02001176163 |
Jun 2001 |
JP |
02001351355 |
Dec 2001 |
JP |
02002157802 |
May 2002 |
JP |