Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Reexamination Certificate
1998-09-02
2002-08-27
Miller, Brian E. (Department: 2652)
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
C219S121630
Reexamination Certificate
active
06441989
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tape guide device for guiding the running of a tape-shaped recording medium which is represented by magnetic tape or the like.
2. Description of Related Art
In general, magnetic tape which is used in a recording and/or reproducing apparatus such as a VTR forms a running path by being guided by a tape guide device.
FIGS. 6 and 7
show one example of a tape guide device which is used in a conventional recording and/or reproducing apparatus.
FIG. 6
is a plan view of the tape guide device, while
FIG. 7
is a cross-sectional side elevational view of the tape guide device.
In the tape guide device shown in
FIGS. 6 and 7
, a bush
63
, a guide post
62
and a shaft
64
are secured to a base
61
. The bush
63
defines the turning center of the base
61
, the guide post
62
serves to guide magnetic tape while allowing the magnetic tape to slide past the guide post
62
, and the shaft
64
serves to turn the base
61
.
If the shaft
64
is operated, the entire base
61
turns about the turning center defined by a central axis O of the inner diameter of the bush
63
, whereby the running path of the magnetic tape which slides on the periphery of the guide post
62
can be determined.
These members
63
,
62
and
64
which are secured to the base
61
have conventionally been fastened to the base
61
by caulking with so-called high speed steel pins.
However, in such conventional example, a radius R
1
of the peripheral portion of a hole
61
a
of the base
61
into which to insert the guide post
62
needs to be made larger than a radius R
G
of the guide post
62
so that a sufficient strength for caulking can be maintained.
For this reason, to prevent other component parts from interfering with the tape guide device, it is necessary to make the component parts distant from the radius R
G
of the guide post
62
and also from the radius R
1
of the peripheral portion of the hole
61
a
. This necessity is an obstacle to a further miniaturization of the recording and/or reproducing apparatus, and reduces the freedom of design of the same.
In recent years, the recording and/or reproducing apparatus has been being miniaturized more and more, and the required precisions of individual parts to be used in such apparatus have being becoming more and more strict. Under such situation, for example, in the above-described conventional example shown in
FIG. 7
, the relative inclination of the central axis O′ of the guide post
62
with respect to the turning central axis O of the base
61
is strictly required to be not greater than 15 minutes in angle.
However, with the conventional securing method using caulking, it has occasionally been impossible to secure individual members while ensuring the highly accurate positional relationship therebetween, because of a deformation, a positional deviation or the like of part of the members during caulking. In such a case, after a caulking process, it becomes necessary to correct the relative inclination by manual bending while measuring the inclination of the central axis O′ with respect to the turning central axis O, and this necessity leads to problems such as an increase in the total number of processes and an increase in cost.
BRIEF SUMMARY OF THE INVENTION
An object of the present invention is to improve a method of securing members which constitute a tape guide device and highly accurately and stably providing a tape guide device suited to miniaturization.
To achieve the above-described object, in accordance with one embodiment of the present invention, there is provided a tape guide device for guiding tape, which comprises a base in which a hole is formed, and a guide post having at one end thereof a smaller-diameter portion than another portion, at least part of the smaller-diameter portion being fitted in the hole of the base, and the guide post and the base being fused to each other in the smaller-diameter portion.
In accordance with another aspect of the present invention, there is provided a recording and/or reproducing apparatus which comprises a rotary cylinder having a plurality of heads for recording and/or reproducing information on and/or from tape, cassette mounting means for mounting a cassette in which tape is accommodated, and a tape guide device for guiding tape which includes a base in which a hole is formed, and a guide post having at one end thereof a smaller-diameter portion than another portion, at least part of the smaller-diameter portion being fitted in the hole of the base, and the guide post and the base being fused to each other in the smaller-diameter portion.
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Canon Kabushiki Kaisha
Chen Tianjie
Miller Brian E.
Robin Blecker & Daley
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