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JPS54309

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS54309
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a magnetic tape cassette
containing a magnetic tape, FIG. 2 is a side view taken along the line-of FIG. 1, and FIG. 3 is a
tape recorder according to the present invention. 4 is a cross-sectional view taken along the line
II--IV of FIG. 4 showing a state after the erasing head fixing step, FIG. 4 is a plan view taken along
the line IV--IV of FIG. Fig. 6 is a schematic plan view after the erasing head fixing step, and Fig. 6
is a schematic plan view after the fixing process of the erasing head.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cartridge type
tape recorder. As shown in FIGS. 1 and 2, generally, magnetic tape force cents used in cartridge
type tape recorders, particularly tape recorders of the auto-reversing type and dual capstan type,
have five or more windows IA, IB,. 2A, 2B and 3 are provided, and one or both of two small
windows 2A, 2B are used as an erasing head insertion window. As described above, since the
erase head reciprocates in a small amount in the small erase head insertion window, the head is
hit and damaged. As a countermeasure, it is conceivable to reduce the gap length of the erasing
head, etc. However, there is a limit to the characteristic of the head, and there is a limit on the
head characteristics. There is nothing other than to accurately determine the relative positional
relationship of the heads. Conventionally, in order to accurately show such positional
relationship, it has been dealt with by raising the precision of the part that affects the precision
in the longitudinal direction of the magnetic tape cassette, but the cost amplifier can not be
avoided. The following is an object of the present invention to provide a cartridge type tape
recorder which eliminates such a disadvantage. The invention will now be described with
reference to the embodiments shown in the drawings. FIGS. 3 to 5 show the state in which the
erasing head 10 is inserted into the erasing insertion window 2A or 2B formed in the magnetic
tape cassette 1. FIG. The position control member 12 comprises an elastic palm 14 and an
upright boss 6 projecting from the chassis 714. And, a sliding plate 18 carrying a magnetic head
is provided at a predetermined distance on the hook 14 and a plurality of steel balls 2 o are
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disposed between the sliding plate 18 and the chassis 14. . The slide plate 18 is guided by a
guide 19 engaged with the long hole, and can slide on the gloss 714 by the interposition of these
ball groups. The sliding plate 18 also has a hole 22 into which the upright post 16 is inserted,
and the length of the hole η in the sliding direction of the sliding plate 18 is sufficiently longer
than that of the upright post 16. Mounted on the slide plate 18 is a guide member 24 having a
holding portion 34 engaged with the upright post 16. The engaging portion 34 has a bifurcated
shape that opens laterally to the 5-sliding direction of the sliding plate 18. It is preferable that
this shape be a substantially U-shape provided with introducing portions 34a and 34b which
gradually increase outward at the tip.
Furthermore, the guide 24 comprises a pair of screw holes 26 and a hole, one of which is a
straight line substantially perpendicular to the longitudinal direction of the magnetic tape
cassette 1 through a bifurcated branch point of the engaging portion 34. It is located at or near
the top. The other screw hole is substantially elliptical, and its major axis substantially coincides
with the magnetic tape force and the longitudinal direction of the set 1. Therefore, when the
screw is loosened as described later, the guide 24 can swing about the screw hole 26 by the
difference between the diameter of the screw screwed to the other screw hole and the major axis
of the screw hole. The guide 24 is fixed to the slide plate 18 by means of screws and 32 which
are screwed into the respective screw holes 26 and paths. On the guide member 24 is firmly
attached an erase head IO, and the insertion portion 36 provided in the erase head 10 is an erase
head insertion window 2A or 2B (2A in FIGS. 2 to 4) of the cassette 1). Can only be inserted in).
6) has a position restricting hole 9, and the upright post 16 is engaged between the position
restricting holes when the magnetic tape cassette is mounted. As shown in the fourth and fifth
figures, the bifurcation point of the engaging portion 讃 of the guide member 24 and the central
point of the screw hole 26 are the central axis of the longitudinal direction of the insertion
portion 36 of the erasing head lO in the sliding direction of the sliding plate. Although it is
preferable to be on a line, as shown in FIG. 6, the branch point of the engaging portion 34 of the
guide 24 may be offset from the central axis. In this case, the shortest distance t between the
central axis of the erasing head insertion window 2A and the center of the position restricting
hole 38 in the sliding direction of the sliding plate 18 and the longitudinal central axis m
between the insertion portions of the ejection head 10 And the shortest distance between
straight lines M which pass through the branch point of the ganoid 24 and which is substantially
perpendicular to the longitudinal direction of the cassette l may be equal. FIG. 7 shows a state in
which the erasing head 10 is inserted into the erasing head insertion window 2A of the magnetic
tape cassette 1, 40a and 4C1b are capstans, 12a and 42b are pinch rollers, and 44 is a recording
and reproducing unit. The head 46 is a tape guide provided on a pinch roller holder. The
assembling process will be described below based on the above-mentioned configuration. The
force is applied to a hole precisely positioned at / ya / 14. The slide plate 18 is caused to slide
forward with the screw 26 of the kite 24 and the loosened condition of the upright pole 16 fixed
by means of a screw or the like. At this time, when the branch point of the holding portion 2 of
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the guide member 24 and the axis in the longitudinal direction of the insertion portion of the
erasing head 10 deviate from each other, either one of the introduction portions 34a and 34111
at the tip of the holding portion 讃Upright boss) 16 abuts against the guide member 24 so that
the guide member 24 is swung in the direction of engagement between the introduction portion
and the upright boss 16 centering on the screwed engagement with the screw hole 26 of the
screw hole. In motion, the longitudinal direction of the kite member 24 and hence the insertion
portion of the erasing head 10 is corrected, and the insertion portion is inserted into the 82A of
the cassette 1 at a suitable distance from the side edge of the window 2A, Fasten the screws I and
the public and fix the guide tone on which the Nodo river is attached to the slide plate 18 to the
erase.
As described above, in the present invention, the position restricting member 8 and the guide
portion are engaged in advance, and the position restricting member is engaged with the guide
member for guiding the 4th head to the erasing head insertion window. It is easy to position the
gutters or increase the precision of the components in the longitudinal direction of the magnetic
chief cassette, and it is possible to determine the relative device relationship between the erasing
head insertion window and the gutters. In addition to cost reduction, it has the effect of
improving productivity, etc. Moreover, even in use, there is no risk that the erasing head abuts
against the cassette to damage it. BRIEF DESCRIPTION OF THE DRAWINGS The first is a plan
view of a magnetic tape cassette in which a magnetic tape is stored, the second section is a side
view taken along the line-of FIG. 1, the erasing head fixing step of the tape recorder according to
the third or the present invention. 4 is a cross-sectional view taken along the line 1--1 of FIG. 3,
and FIG. 5 is a partial cross-sectional view taken along the line V-V @ of FIG. FIG. 6 is a modified
example of the guide, and FIG. Description of the sign of the main part 1 ......... magnetic tape
cassette 10 ........ erase head 12 ......... position regulating member 18 ......
································································································································································· Insertion
Department. Applicant Pioneer Corporation Attorney Attorney Fujimura Gen-fi? −ソ::。 ニヤ
ー、! f〜□。 10-· Q mouth] · 0 臂-400 □ -1 /? / Acknowledgment 38 T vote wise '211 1 1 1
1 "309 m 1 lli village Yuan Gen 3 and 2' z 277, /" + H, 1: ,,,-, g, 6/4 / · 2 ° -7 third skin X 4th H,
2z Mi, / 84 b-w 24% agent Fujimura Gen ,! Tribute-L Ha 26 5th edition 2436/21! 8 "4 o t 9 1 1 1
0 09 agents Fujimura Gen,-. −, 34′4 b b 4 ′ ′ 1 − − − J 42 jp O10, R-iHo • L, / qz 47 ′
ym voice − cinnabar 1 3 o 9 agent Fujimura Yuan, 5 list of attached documents (1)
Description 1 (2) Drawing 1 (3) Application form 1 copy (1) (4) Power of attorney 1 (5)
Application examination request form 1 copy 6 Inventor's address accommodation other than the
above N '# Miiitm 4 chome address Bio = A Co., Ltd.處 R4 name 筈 Ma) R? ˜ 3 2 2
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