Dynamic magnetic information storage or retrieval – Head mounting – For moving head during transducing
Reexamination Certificate
1998-10-22
2002-07-30
Tupper, Robert S. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head mounting
For moving head during transducing
Reexamination Certificate
active
06426852
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rotary head drum assembly for a tape recorder and, more particularly, to a connection structure of a flexible printed circuit for electrically connecting a head drum assembly and a main printed circuit board (PCB). The connection structure is for transmitting to the main PCB an information signal read while a magnetic head scans a magnetic tape.
2. Description of the Related Art
A head drum assembly which rotates at a high speed for recording/reproducing information on/from a magnetic tape by a magnetic head is provided in a deck of a camera-incorporated tape recorder, e.g., a camcorder, or a VCR.
Referring to
FIGS. 1 and 2
, a conventional head drum assembly
100
installed in a tape recorder includes a rotary drum
120
rotatably supported by a rotation shaft
110
and in which a magnetic head “h” is installed, and a stationary drum
130
obliquely fixed to a drum base
11
mounted to a main base
10
. The rotary drum
120
is rotatably coupled to the stationary drum
130
such that the rotation shaft
110
is supported by a bearing
111
.
A stator core
140
around which a coil
141
is wound and a ring-shaped motor rotor
150
, having a magnet
151
facing the stator core
140
, are installed in the lower portion of the stationary drum
130
. Reference numerals
121
and
131
of
FIG. 2
represent a rotating rotary transformer and a fixed rotary transformer, installed in the rotary drum
120
and the stationary drum
130
, respectively.
The rotating rotary transformer
121
and the fixed rotary transformer
131
are structured by a configuration of a plurality of concentric circles, and a coil (not shown) is wound in a concave groove (not shown) between the respective concentric circles. The coil wound around the rotating rotary transformer
121
is connected to the magnetic head “h”, and the coil wound around the fixed rotary transformer
131
is connected to a flexible printed circuit
132
drawn out via a through-hole
130
a
formed at a side wall of the stationary drum
130
. An end of the flexible printed circuit
132
is connected to a connector
133
, and the connector is coupled to a connector holder
12
provided in the drum base
11
to be electrically connected to a connector
21
installed in the main PCB
20
. Thus, the information signal read by a scanning operation of the magnetic head “h” is transmitted to the main PCB
20
through the flexible printed circuit
132
.
According to the conventional head drum assembly having the above-described configuration, in order to transmit the information signal read by the scanning of the magnetic head “h” to the main PCB
20
, the flexible printed circuit
132
connected to the fixed rotary transformer
131
is drawn out via the through-hole
130
a
formed at the side wall of the stationary drum
130
to be connected to the main PCB
20
. Thus, the length of the flexible printed circuit
132
is excessively increased, which may cause noise.
Also, since the drum base
11
having the connector holder
12
for supporting the connector
133
must necessarily be mounted to the main base
10
to stably connect the flexible printed circuit
132
to the connector
133
, the manufacturing cost increases.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide an improved rotary head drum assembly for a tape recorder, by which the length of a circuit for connecting a rotary transformer of a stationary drum and a main printed circuit board (PCB) is greatly reduced, and the connecting structure of the rotary transformer and the main PCB is simplified.
To accomplish the above object of the present invention, there is provided a head drum assembly for a tape recorder including a stationary drum fixed on a main base of a deck and having a through-hole formed in the bottom thereof, a rotary drum having a magnetic head and rotatably installed on the stationary drum by a rotation shaft, a flexible printed circuit electrically connected to rotary transformers respectively installed in the rotary drum and the stationary drum, for transmitting an information signal read by the magnetic head to a main printed circuit board (PCB), and a first connector coupled to an end of the flexible printed circuit for electrically connecting the flexible printed circuit to the main PCB, wherein the flexible printed circuit is drawn out directly downward via the through-hole so that the first connector is electrically connected to a second connector mounted to the main PCB.
In this case, the first connector is fittingly coupled to the through-hole.
REFERENCES:
patent: 4829401 (1989-05-01), Vranken
patent: 5010432 (1991-04-01), Fukushima et al.
patent: 5321569 (1994-06-01), Sakai
patent: 5392180 (1995-02-01), Hasegawa
patent: 60-60704 (1985-04-01), None
patent: 61-160801 (1986-07-01), None
patent: 62-21203 (1987-01-01), None
patent: 2-9002 (1990-01-01), None
patent: 2-282903 (1990-11-01), None
patent: 2-282904 (1990-11-01), None
patent: 10-112002 (1998-04-01), None
Patent Abstract of Japan 02-009002 Jan. 12, 1990.
Patent Abstract of Japan 60-185204 Sep. 20, 1985.
Patent Abstract of Japan 03-259402 Nov. 19, 1991.
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
Tupper Robert S.
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