Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Reexamination Certificate
2002-06-05
2004-06-08
Korzuch, William (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
Reexamination Certificate
active
06747839
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a magnetic recording/reproducing device used for a videotape recorder, an audio tape recorder, etc., which provides reliable operation whilst being compact in size.
2. Description of the Related Art
Referring to
FIGS. 3 and 4
, a conventional magnetic recording/reproducing device will be described below.
FIG. 3
is a top view of a conventional magnetic recording/reproducing device.
FIG. 4
is a cross-sectional view of the conventional magnetic recording/reproducing device taken along line B—B of FIG.
3
.
In
FIGS. 3 and 4
, reference numeral
1
denotes a substrate, reference numeral
1
a
denotes a horizontal plane of the substrate
1
, reference numeral
2
denotes a rotary head cylinder mounted on the horizontal plane
1
a
of the substrate
1
, reference numeral
3
denotes a cassette placed on the substrate
1
, reference numeral
4
denotes a (magnetic) tape of the cassette
3
, reference numerals
5
,
6
,
7
and a denote tape guide members for guiding the tape
4
, reference numeral
9
a
denotes a first post stopper, and reference numeral
9
b
denotes a second post stopper. The post stoppers
9
a
and
9
b
have the same structure. Reference numeral
10
denotes a screw used for attaching the post stoppers
9
a
and
9
b
to the horizontal plane
1
a
of the substrate
1
. Reference numeral
11
denotes a vertical reinforcing wall provided on the substrate
1
in the vicinity of the rotary head cylinder
2
. The reinforcing wall
11
lies in a vertical plane with respect to the horizontal plane
1
a
of the substrate
1
. The vertical reinforcing wall
11
is provided on the substrate
1
, since the substrate
1
is required to be precisely maintained in a prescribed condition (e.g., a size and form of the substrate is maintained) and is required to be strong in a region around the rotary head cylinder
2
. It is common practice in the field of magnetic recording/reproducing devices to provide a vertical reinforcing wall, such as the vertical reinforcing wall
11
, on a substrate of a magnetic recording/reproducing device for this purpose. Reference numeral
12
denotes a first roller post, and reference numeral
18
is a second roller post. As will be described below, the first roller post
12
and the second roller post
18
have the same structure and each of the first roller post
12
and the second roller post
18
includes a roller shaft
13
, a roller
14
, which is supported by the roller shaft
13
so as to be rotatable about the roller shaft
13
, an upper flange
15
, and a lower flange
16
. The upper flange
15
and the lower flange
16
are placed on the roller shaft
13
and respectively define top and bottom positions of the tape
4
which is caused to wrap around the roller
14
. The roller shaft
13
is positioned in a roller post guide member
17
through pressing or the like.
The operation of the above-described conventional magnetic recording/reproducing device will now be described with reference to
FIGS. 3 and 4
.
The first roller post
12
is moved using the roller post guide member
17
by a tape guide post drive section (not shown) until the upper flange
15
and the lower flange
16
of the first roller post
12
come into contact with the first post stopper
9
a
, so that the movement of the first roller post
12
is stopped by the first post stopper
9
and is thereby placed in the prescribed position shown in
FIGS. 3 and 4
. The second roller post
18
is placed in the prescribed position shown in
FIG. 3
in a similar manner. In this case, the upper flange
15
and the lower flange
16
of the second roller post
18
are in contact with the second post stopper
9
b
. The tape guide members
5
and
7
are also moved to their respective prescribed positions shown in
FIG. 3
by the tape guide post drive section (not shown). In this operation, the tape
4
is drawn out from the cassette
3
by the motion of the first roller post
12
in a direction away from the cassette
3
, the second roller post
18
and the tape guide members
5
and
7
, so that the tape
4
is put in the state shown in FIG.
3
.
In
FIG. 3
, E and F denote attachment spans which define the mounting precision of the first post stopper
9
a
and the second post stopper
9
b
with respect to the substrate
1
, and H denotes the depth of the conventional magnetic recording/reproducing device.
In this conventional structure, in which space is required for attaching the first post stopper
9
a
and the second post stopper
9
b
to the horizontal plane
1
a
of the substrate
1
by screws
10
, operational elements cannot be placed in the region around the rotary head cylinder
2
, the first post stopper
9
a
and the second post stopper
9
b
. As a result, the conventional magnetic recording/reproducing device is required to be larger so as to provide such elements. Moreover, the first roller post
12
and the second roller post
18
provided in the region around the rotary head cylinder
2
are required to be placed in their respective prescribed positions with high precision so as to provide correct and reliable operation of the rotary head cylinder
2
in recording/reproducing information to/from the tape
4
, and thus, in the first instance, the first post stopper
9
a
and the second post stopper
9
b
are required to be mounted on the substrate
1
with high precision.
In order to achieve such highly precise mounting of the first post stopper
9
a
and the second post stopper
9
b
, the attachment spans E and F of the first post stopper
9
a
and the second post stopper
9
b
are required to be large so as to provide necessary fine adjustment for the precise placement of the first and second post stopper
9
a
and
9
b
. However, the rotary head cylinder
2
Is In the vicinity of the first and second post stoppers
9
a
and
9
b
, and thus it is not possible to make the mounting spans E and F sufficiently large to achieve the required high precision. Furthermore, if the attachment span F is lengthened, a distance between the rotary head cylinder
2
and the reinforcing wall
11
provided on the substrate
1
is increased, which creates the following problems. First, If this distance becomes too large, then the effect of the reinforcing wall
11
of strengthening the region around the rotary head cylinder
2
is not provided second, the depth H of the conventional magnetic recording/reproducing device is increased, such that a sufficiently compact device is not achieved.
SUMMARY OF THE INVENTION
According to one aspect of the present invention, there Is provided a magnetic recording/reproducing device in which a tape drawn from a cassette wraps around a rotary head cylinder at a prescribed angle for recording information on or reproducing information from the tape includes: a substrate on which the rotary head cylinder is provided; a tape guide post for drawing the tape from the cassette and causing the tape to wrap around the rotary head cylinder; a tape guide post drive section for driving the tape guide post; and a post stopper for placing the tape guide post at a prescribed position, the substrate including a reinforcing wall in the vicinity of the rotary head cylinder, the reinforcing wall being in a vertical plane with respect to a horizontal plane of the substrate, and the post stopper being provided on the vertical reinforcing wall.
In one embodiment of this invention, the position of the post stopper on the vertical reinforcing wall can be finely adjusted such that the post stopper places the tape guide post at the prescribed position with high precision.
In one embodiment of this invention, the tape guide post includes a first tape guide post and a second tape guide post, and the post stopper includes a first post stopper and a second post stopper for respectively placing the first and second tape guide posts in respective first and second prescribed positions, the first and second post stoppers being respectively provided upstream and downstream of the tape traver
Hirabayashi Koichiro
Konishi Akio
Castro Angel
Korzuch William
Matsushita Electric Industrial Co.
Renner , Otto, Boisselle & Sklar, LLP
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