Dynamic magnetic information storage or retrieval – Head mounting – For moving head during transducing
Reexamination Certificate
2000-06-27
2002-06-11
Heinz, A. J. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head mounting
For moving head during transducing
C360S281000
Reexamination Certificate
active
06404597
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic head device in which a core chip is mounted on a head base. More particularly, the invention relates to a magnetic head device in which a coil of a core chip is electrically connected to a head base.
In a video head of the rotary drum type used in a video deck, a plurality of magnetic head devices are mounted on a rotating drum. Each magnetic head device includes a core chip provided with a magnetic core and coil, and a head base supporting the core chip. A related magnetic head device is shown in FIG.
5
. In the magnetic head device shown in
FIG. 5
, a core chip
101
is disposed on one end of the head base
100
. The core chip
101
includes a magnetic core
102
and a coil
103
wound around the magnetic core
102
. A lead wire
104
is derived from the coil
103
.
A wiring pattern
105
is formed on one main face of the head base
100
. The lead wire
104
derived from the coil
103
is electrically connected to the wiring pattern
105
.
In the magnetic head device, the wiring pattern
105
is disposed on one of the main faces of the head base
100
, while the core chip
101
is disposed on the other main face of the head base
100
. The lead wire
104
, as shown in
FIG. 6
, is led from the coil
103
to the one main face by way of the other main face. The lead wire
104
is connected to the wiring pattern
105
on the one of the main faces of the head base
100
.
In the above-mentioned magnetic head device, to protect the lead wire
104
derived from the coil
103
, a resin
106
is formed on both the main faces of the head base
100
, while covering the lead wire
104
. That is, the resin
106
covers the lead wire
104
to prevent the lead wire
104
from being disconnected or corroded.
In the magnetic head device, to form the resin
106
, the workability is poor, and hence the productivity is also poor. Even if the resin
106
is formed, the lead wire can be disconnected since the lead wire
104
is located at both the main faces.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a magnetic head device which provides a reliable leading of the lead wire derived from the coil and reliably prevents the disconnection and corrosion of the lead wire.
In order to achieve the above object, according to the present invention, there is provided a magnetic head device comprising:
a core chip including a magnetic core having a magnetic gap and a coil formed around the magnetic core; and
a head base including a first main face on which a wiring pattern to which a conductive wire derived from the coil is electrically connected is formed, and a second main face on which the core chip is mounted.
One end portion of the first main face is slanted and the core chip is mounted on the one end portion of the second main face. A recess or a slit is formed on the slanted portion of the first main face to pass the conductive wire therein.
In the thus constructed magnetic head device, the conductive wire derived from the coil of the core chip is led out and passes through the recess or the slit to be connected to the wiring pattern. It is noted that in the magnetic head device, the conductive wire is connected to the wiring pattern not by way of the second main face. It is noted further that in the magnetic head device, the conductive wires pass through the recess or slit. With this structure, the influence of accidental impact from outside (upon the conductive wire is reduced.
REFERENCES:
patent: 5999376 (1999-12-01), Nakano
patent: 6014286 (2000-01-01), Tsutaki
patent: 8-102008 (1996-04-01), None
Heinz A. J.
Mitsumi Electric Co. Ltd.
Whitham Curtis & Christofferson, P.C.
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