Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Reexamination Certificate
1999-03-11
2001-09-11
Evans, Jefferson (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
C360S085000, C360S095000, C360S096510
Reexamination Certificate
active
06288865
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a magnetic recording/reproduction apparatus, and more particularly, relates to a magnetic recording/reproduction apparatus provided with a mechanism of moving a sub-chassis relative to a main chassis.
2. Description of the Related Art
An example of conventional magnetic recording/reproduction apparatus is disclosed in FIGS. 11 and 12 of Japanese Patent Gazette No. 2627465. Referring to
FIGS. 36
to
38
, a conventional magnetic recording/reproduction apparatus will be described.
In the conventional magnetic recording/reproduction apparatus
300
shown in
FIGS. 26
to
38
, a pinch arm
335
and a sub-pinch arm
339
are swingably attached coaxially to a swing shaft
337
mounted on a slide chassis
301
. A swing pin
349
(
FIG. 37
) extends from the sub-pinch arm
339
, so as to transmit a driving force from a main chassis
351
for swinging the pinch arm
335
.
A main cam
353
is swingably mounted on the main chassis
351
. The main cam
353
has a pinch roller pressing groove
367
, which engages with a cam pin
389
extending from one end of a pinch operation level
369
.
The other end of the pinch operation lever
369
engages with a pinch pressing lever
371
which is swingably attached to a shaft mounted on the main chassis
351
. The pinch pressing lever
371
has abut faces
347
A and
347
B.
The abut faces
347
A and
347
B of the pinch pressing lever
371
engage with the swing pin
349
of the sub-pinch arm
339
, so as to drive the pinch arm
335
on the slide chassis
301
.
The above configuration requires a number of components disposed between the main cam
353
and the pinch arm
335
to drive the pinch arm
335
(e.g., the pinch operation lever
369
, the pinch pressing lever
371
, and various shafts). This prevents a reduction in the number of components and in the size of the mechanism from being realized.
The object of the present invention is to provide a magnetic recording/reproduction apparatus provided with a small mechanism with a reduced number of components.
SUMMARY OF THE INVENTION
The recording/reproduction apparatus of this invention records/reproduces information on/from a magnetic tape by drawing out the magnetic tape from a tape cassette and allowing the magnetic tape to pass around a rotary head cylinder, having a rotary head, for a predetermined arc, the tape cassette being drawn by moving tape guide members located at an opening of the tape cassette. The apparatus includes: a first chassis on which the tape cassette is placed; and a second chassis having the rotary head cylinder mounted thereon and guiding movement of the first chassis toward the rotary head cylinder, the magnetic recording/reproduction apparatus including: a first state in which the tape cassette is placed on the first chassis by a user; and a second state in which a tape running path enabling recording/reproduction of the magnetic tape is established, the second chassis including: a capstan shaft mounted on the second chassis for driving the magnetic tape; a pinch roller for pressing the magnetic tape against the capstan shaft; and a pinch arm supporting the pinch roller to be rotatable, the pinch arm being swingably mounted on the second chassis, wherein when the magnetic recording/reproduction apparatus shifts from the first state to the second state, the first chassis moves toward the rotary head cylinder, and during the movement of the first chassis toward the rotary head cylinder, the first chassis drives the pinch arm so that the pinch roller moves from the opening of the tape cassette to a vicinity near the capstan shaft.
In one embodiment of the invention, the pinch arm includes a first chassis engaging portion engaging with the first chassis, the first chassis includes a pinch arm engaging portion engaging with the first chassis engaging portion, the first chassis presses the first chassis engaging portion via the pinch arm engaging portion so that the pinch roller moves from the opening of the tape cassette to a vicinity near the capstan shaft.
In another embodiment of the invention, the first chassis is made of a metal plate, and the pinch arm engaging portion is formed by bending a portion of the metal plate.
In still another embodiment of the invention, the magnetic recording/reproduction apparatus further includes an elastic member for urging the pinch arm in a direction opposite to the capstan shaft with respect to the pinch arm.
In still another embodiment of the invention, the elastic member comprises a spring, and one end of the spring is hooked to the pinch arm and the other end of the spring is hooked to a spring hook portion of the first chassis.
Thus, the invention described herein makes possible the advantage of providing a magnetic recording/reproduction apparatus provided with a small mechanism with a reduced number of components.
This and other advantages of the present invention will become apparent to those skilled in the art upon reading and understanding the following detailed description with reference to the accompanying figures.
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U
Hirabayashi Koichiro
Kawane Hideaki
Konishi Akio
Saito Yoshiyuki
Evans Jefferson
Matshushita Electric Industrial Co. Ltd
Renner , Otto, Boisselle & Sklar, LLP
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