Note: Descriptions are shown in the official language in which they were submitted.
1049989
1 This invention relates to cas.sctte tape recordcrs
using a tape cassette accol~lodating a magnetic tape.
In the cassette tape recorder, the magnetic
tape is usually driven at a particular fixed speed such
as 4.8 cm/sec. Thcreforc, if a 60-minute tape cassette,
for instance, is loaded in the tape recorder of this .
type for recording, it is possible to obtain only 60
minutes recording. Since the available recording period
is fixed in this case, it may sometimes be insufficient
to cover the whole scheduled period of recording intended
such as recording of the proceeding of a conference or
meeting. This problem of curtailing the whole scheduled
recording would be widely alleviated if it is made
possible to extend or switch the recording period, for
instance from 60 minutes to 120 minutes, with the afore-
mentioned 60-minute tape cassette.
An object of the invention, accordingly, is
to provide for a particular one of alternative constant
tape drive speeds that is selected automatically in
an interlocked relation to an action of setting the
tape drive speed if the tape cassette loaded is provided
with a particular tape speed specifying means, which
is to be detected for setting the afore-mentioned parti-
cular tape speed.
` 25 Another object of the invention is to ensure
reliable tape speed selection for setting the particular
constant tape drive speed by arranging such that the
presence or absence of the afore-said particular tape
speed specifying mcans is detected in an initial state
of the action oL` setting the tape drive speed.
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1049989
1 Still another object oi the invention is to
ensure further reliablc tape speed ,selection for setting
the particular constant tape drive speed by arranging
such that the presence or absence oI the particular
tape speed specifying means is detected with the load-
ing of a tape cassette.
The above and other objects of the invention
will become more apparent from the following detailed
description of the invention when the same is read in
connection with the accompanying drawlngs, in which:
Fig. 1 is a plan view showing a first embodi-
ment of the cassette tape recorder according to the
invention with a cassette provided with a particular
tape speed specifying means loaded therein;
Fig. 2 is a plan view showing the same tape
recorder but loaded with a cassette not provided with
any particular tape speed specifying means, the recorder
:
here being in a state after the tape drive speed
setting action;
Fig. 3 is a plan view showing a second embodi-
ment of the cassette tape recorder according to the
, invention with a cassette provided with a particular
tape speed specifying means loaded therein;
` Fig. 4 is a plan view showing the same tape
recorder but loaded with a cassette not provided with
any particular tape speed specifying means, the recorder
here being in a state after the tape drive speed setting
action;
Fig. 5 is a plan view showing a third embodi-
ment of the cassette tape recorder according to the
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.- , . . , . ~: ~ . , ~
1049989
1 invention with a cassette provided wlth a particular
tape speed specifyirl~ means loaded th~rein;
Fig. 6 is a plan view showing the same tape
~ecorder but loaded with a cassette not provided with
any particular tape speed speci-fying means, the recorder
here being in a state after the tape drive speed se-tting
action;
Fig. 7 is a side view showing the recorder
in the state of Figs. 1, 3 and 5;
Fig. 8 is a side view showing the recorder
in the state of Figs. 2, 4 and 6;
Fig. 9 is a plan view showing a fourth embodi-
ment of the cassette tape recorder according to the
invention with a cassette provided with a particular
tape speed specifying means loaded therein; and
Fig. 10 is a plan view showing the same tape
recorder but loaded with a cassette not provided with
any particular tape speed specifying means, the recorder
here being in a state after the tape drive speed setting
action.
Embodiment shown in Fi~s. 1, 2, 7 and 8
. ~
Referring now to Figs. 1 and 2, which show a
first embodiment of the invention, designated at 1 is
a tape cassette mounted on reel bases 2 and 2', at
3 and 4 a capstan and a pinch roller respectively for
clamping between them and driving a magnetic tape 1~
contained within the cassette 1, at 5 a flywheel coaxial
and rotatable in unison with the capstan 3, and at 6 a
drive motor for rotating the flywheel. Designated at
,
- 3
,. . .
.
1049989 :~
1 7 is a speed select member carrying the motor 6 and
movable in the directions of arrows ~ and B, that is,
in the axial direction of the shaft of thc motor 6,
with the guidance by guide pins 9, 10 and 11 extending
: 5 upright from a base ~, at 12 a link arm rotatable about
a support pin 13 and having a slot 12a formed at one
end and receiving a pin 7a extending from the corres-
ponding end of the select member 7, at 14. a tension spring
rotationally biasing the link arm 12 in the clockwise
: 10 direction, at 15 a link lever linked at one end by a
pin 16 to the other end of the link arm 12 and having
:: channel-like extensions 15a and 15b formed at the other
end, at 17 a tension spring provided between the link
:: :
` lever 15 and link arm 12 and rotationally biasing the
link lever 15 in the clockwise direction, and at 18 a
hook or stopper provided at the free end of the extension
15b of the link lever 15. Designated at 19 is an
. operating lever for tape drive speed setting, which has
a pin 20 adapted to engage the hook 18 of the link lever
.~ 20 15 with the clockwis.e rotation thereof and is movable
in the directions of arrows C and D under the guide by
guide pins 21 and 22 extending upright from the base 8
for setting constant tape drive speed for recording or
playback, at 23 a tape speed setting knob provided on
~ 25 the operating lever 19, and at 24 a tension spring
`~ provided between the operating lever 19 and a pin 25
extending upright from the base 8 and biasing the
~` lever 19 in the direction of arrow C. Designated at
26 is a lock lever, which is rotatable about the guide
pin 10 for guiding the movement o~ the select member 7
'~' ' _ 4 _ "'
: :
1049989
1 and is providod at its cnd opposite its support point
at the guide pin 10 with a shoulder or stopper 26a
adaptcd to engage the lowcr end of the operating lever
19 for tape speed setting, at 27 a tension spring sretched
between the lock lever 26 and pin 25 and biasing the
lock lever 26 in the clockwise direction, and at 28 a
lock release knob provided on the lock lever 26.
Designated at 29 is a detecting lever rotatably
supported by a pin 30 and having a detecting piece 29a
for detecting the presence or absence of a particular
tape speed specifying piece la which may be provided
at the rear end of the cassette 1. Designated at 31
is a rotary arm, which is rotatably supported by a pin
32 and is provided with a pin 31a extending from its
one end and received in a slot 29b formed in the detect-
; ing lever 29 and a pin 31b extending from its other end
and adapted to engage with the extension 15a of the link
lever 15 and further provided with a pin 31c adapted to
engage with a shoulder 19a provlded in the tape drive
speed setting lever 19 on one side thereof, at 33 a ten-
sion spring rotationally biasing the rotary arm ~ in
the counterclockwise direction, and at 34 a pin serving
to restrict the rotation of the rotary arm 31.
Referring now to Figs. 7 and ~, the shaft of
the motor 6 is provided with a motor pulley 35, which is
fittedly sccured thereto and consists of tapered small
diameter and large diameter portions 35a and 35b. When
the motor 6 is displaced in the direction of its shaft
- with a movement of the select member 7, either small
diameter or large diameter portion 35a or 35b of the motor
-- 5 --
1049989
1 pulley '35 :is ad.-lptcd to be brought into forced contact
with the top of an ed~e portion of the flywheel 5,
whereby the flywheel 5 is rotated at a spced determined
by the diameter of the small diameter or large di~neter
portion 35a or 35b. The motor 6 is rotatably supported
by coaxial pins 6a and 6b extending ~rom its opposite
sides and fitted in respec-tive holes (not shown) formed
in the select member 7 on the opposite sides of the motor.
The motor 6 is also downwardly biased by a leaf spring
36 providcd on the inner side of the top wall of the
select member 7 such that the motor pulley 35 is urged
against the flywheel 5. The base 8 is formed with an
, opening or aperture (not shown), within which the motor
~ 6 can be freely rotated.
,~ 15 In the operation of this embodiment, if a
tape cassette 1 which is provided at the rear end with
a particular tape speed specifying piece la as shown
in ~ig. 1, is mounted on the reel bases 2 and 2', by
operating the ta.pe speed setting knob 23 in the direction
of arrow D the detec,ting piece 29a of the detecting
lever 29 is engaged by the specifying piece la, whereby
the pin 31b provided at one end of the rotary arm 31
' holds the hook 18 provided at the tip of the extension
~, 15b of the link arm 15 at a position spaced from the
pin 20 extending from the tape speed setting lever 19.
, Thus, even by further moving the tape speed setting
- knob 23 in the direction of arrow D (for recording or
playback) the operating force is not transmitted to the
select member 7, so that the initially available tape
speed is not switchcd. At this time, the select member
, _ 6 --
.
... . .
lQ49~89
, together with the motor 6 carried by lt, is held in
a po~ition at the end o~ it~ movement in -the direction
of arrow B by the link arm which is rotationally biased
by the spring 14 in the clockwise direction. Thus,
the large diameter portion 35b of the motor pulley 35
is urged against the top of the edge portion of the
flywheel 5 by the leaf spring 36, as shown in Fig. 7.
In this case, by the operation of the knob 23 toward the
side for recording or playback the flywheel 5 is rotated
at a first speed determined by the diameter of the urged
portion of the large diameter portion 35b of the motor
pulley 35 Ior driving the tape 1~ at a corresponding
speed.
If a tape cassette 1 without the particular
tape speed specifying piece la is mounted on the reel
bases 2 and 2' as shown in ~ig. 2, by operating the tape
speed setting knob 23 the detecting piece 29a of the
:: detecting lever 29 intrudes into a recess lb provided
in the cassette 1 without being blocked by any particular
tape speed specifying piece la, with the counterclock-
wise bïased rotary arm 31 coming to assume its position
in engagement with the pin 34, as shown in Fig. 2. At
this time, the pin 31b provided at the end of the rotary
arm 31 is found at a position spaced from the extension
15a of the link lever 15. Thus, with the operation of
the tape speed setting knob 23 in the direction of arrow
D (for recording or playback) the hook 18 provided at
the tip of the extension 15b of the link lever 15,
which is biased by the tension spring 17 and tending to
rotate about the pin 16 in the clockwise direction,
.
1049989
1 is brought into enga~ement with the pin 20 extending
from the tape speed setting lever 19. In this stat~,
by further operating the tape speed settlng knob 23 in
the afore-mentioned direction the operating force is
transmitted through the pin 20, link lever 15 and link
arm 12 to the select member 7. As a result, the select
member 7 is moved in the direction of arrow ~. At
this time, the tape speed setting lever 19 is ultimately
locked with its lower end engaged by the shoulder 26a
of the lock lever 26. With the movement of the select
member 7 in the direction of arrow A, accompanied by
the movement of the motor 6 in unison with the member
7, the small diameter portion 35a of the motor pulley
35 comes to be urged against the top of the edge portion
of the flywheel 5 by the leaf spring 36, as shown in
Fig. 8, that is, the motor pulley 35 is brought to the
position shown in Figs. 2 and 8. In this case, the
flywheel 5 is rotated at a second speed determined by
the diameter of the urged portion of the small diameter
portion 35a of the motor pulley 35 for driving the tape
1~ at a corresponding second speed.
When the lock release knob 28 is subsequently
depressed to rotate the lock lever 26 in the counter-
clockwise direction, the tape speed setting lever 19
is released from the lock and is thereupon moved in the
direction of an arrow C (for stopping) by the biasing
, spring 24. As a result, the pin 20 is separated from
the hook 18 of the link lever ~, causing clockwise
, rotation of the arm 12 biased by the spring 14 to move
i 30 the select member 7 in the direction of arrow B, that is,
., .
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:. . . .
1049989
1 movc t;he motor 6 in 1;he directlon of arrow ~. Thus,
the motor pulley 35 is restomd to its initial position
shown in Fig. 7, with its large diameter portion ~5b
now urged against the flywheel 5 by the leaf spring 36.
Meanwhile, with the movement of the tape speed setting
lever 19 in the direction ol arrow C the shoulder l9a
oI the lever 19 strikes and urges the pin 31c of the
rotary a~m 31 to rotate the arm 31 in the clockwise
direction, causing counterclockwise rotation of the
detecting lever 29 coupled to the arm 31, whereby the
detecting piece 29a is brought out of the recess lb in
the cassette 1 and returned to the position shown in
Fig. 1.
In the first embodiment described above,
the detecting lever 29 is rendered rotatable in an
initial stage of operation of the tape speed setting
lever 19 in the direction of arrow D (for recording or
playback) to permit the detection of presence or absence
of the particular tape speed specifying piece la provided
on the cassette 1, thus ensuring reliable tape speed
selection.
First modification shown in Fi~s. 3, 4, 7 and 8
Figs. 3 and 4 show a second embodiment of
the cassette tape recorder according to the invention.
In this embodiment, the detection of whcther the tape
cassette 1 loaded is provided with a particular tape
speed specifying piece la or not with the loading of
the cassette to thereby ensure further reliable tape
speed selection. In Figs. 3 and 4 the same parts as
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1049989
1 those in Figs. 1 and 2 are dcsignated by the same
reference symbols, and which parts are not described
any -further but only the different portion of -the con-
struction will be described.
Designated at 37 is a tape speed setting lever,
; which has a pin 20 adapted to engage with hook 18 of
link lever 15 with the clockwise rotation thereof and is
movable in the direction of arrows C and D under the
guide by guide pins 21 and 22 extending upright from
; 10 the base 8, at 38 a detecting lever rotatably supported
by pin 30 and having a detecting piece 38a for detecting
whether cassette 1 is provided at the rear end thereof
with particular tape speed specifying piece la, at 39
an auxiliary detecting lever rotatably supported by
a pin 4Q and having an end portion 39a adapted to engage
a corresponding end 38b of the detecting lever 38 and
a pin 39b adaptedto engage the rear end face of the tape
cassette 1, at 41 a tension spring rotationaly biasing
the auxiliary detecting lever 39 in the clockwise direc-
tion, at 42 a pin extending upright from the base 8 and
...
serving to restrict the rotation of the auxiliary detect-
ing lever, and at 43 a rotary arm, which is rotatably
' supported by pin 32, is provided with a pin 43a extending
:,
from its one end and received in a slot 38c formed in
the detecting lever 38 and a pin 43b extending from its
other end and adapted to engage with an extension 15a
of the link lever 15 and is biased by a spring 33 in
the counterclockwise direction, and the rotation of
which is restricted by a pin 34 extending from base 8.
. . ,~
Ln the operation of this embodiment, when a
- 10 -
..
11~49~9
1 tape cassette 1 is mounted on reel bases 2 and 2',
the pin 39'b provided on the auxiliary dete~cting lever 39
is urged by the rear end f~ce o~ the cassette 1 to
'cause counterclockwi,se rotation o-f the levcr 39 about
5 the pin 40 against the orce of the spring 41. As a
result, the engagement between the end portion 39a of
the auxiliary detecting lever 39 and the corresponding
end portion 38b of the detecting lever 38 is released,
whereby the detecting lever 38 is rotated in the clock-
10 wise rotation by spring 33 biasing the rotary arm ~3.
At this time, if the cassette 1 is provided with a
particular tape speed specifying piece la as shown in
~ig. 3, the detecting piece 38a of the detecting lever
38 strikes and is stopped by the specifying piece la.
15 With the stopping of the clockwise rotation of the
detecting lever 38 no further counterclockwise rotation
of rotary arm 43 coupled to the detecting lever 38 is
caused to cause no further counterclockwise rotation
of the link lever 15 coupled to a,pin 43b provided at
20 the corresponding end of the rotary arm 43. In other
words, in this case the hook 18 provided at the tip of
the extension 15b of the link lever 15 is not brought
into engagement with the pin 20 extending from the tape
' speed setting lever 37. ~hus, even by operating the
,; 25 tape speed setting knob 23 in this state to render the
system into recording or playback sta-te the operating
force applied to the knob 23 is not transmitted to select
~' member 7, so that the initially available tape speed
" is not switched. In this case, a motor pulley 35 is
30 held in its position shown in ~lgS. 3 and 7, with its
~49989
1 largc diameter portion 35b u-r~cd a~alnst the top of the
edge portion of the -flywheel 5 by the leaI spring 36,
and the ~lywheel 5 is thus rotated at a first speed
determined by the diameter of the urged portion of the
large diameter portion 35b of the motor pulley 35 for
driving tape lT at a corresponding first speed.
If the cassette 1 loaded is not provided with
any particular tape speed specifying piece la as shown
in Fig. 4, the detecting piece 38a of the detecting
lever 38 intrudes, with rotation thereof, into a recess
lb provided in the cassette 1, with the rotary arm 43
coming to be held at a position in engagement with pin
34. At this time, the pin 43b provided at the end of
the rotary arm 43 is found at a position spaced from
extension 15a of the link lever 15. Thus, the hook 18 `~
- provided at the tip of the extension 15b of the link
lever 15, which is biased by the tension spring 17 and
: tending to rotate about the pin 16 in the clockwise
:~ direction, is brought into engagement with the pin 20
extendlng from the tape speed setting lever 37. This
state is shown in Fig. 4. In the state of Fig. 4, by
operating the tape speed setting knob 23 in the direc-
tion of an arrow D (for recording or playback) the
~ operating force is transmitted through the pin 20, the
.. /$
link lever ~9 and the link arm 12 to the select member
7, thus causing the movement of the select member 7
. in the direction of an arrow A. With the movement of
the select member r7 in the direction of the arrow A,
the motor 6 is also moved in the same direction so that
small diameter portion 35a of the motor pulley 35 comes
- 12 -
1049989
1 to be ur~cd against the top o r thc cdgc portion of
the flywhecl 5 by the leaf spring 36, as shown in
Figs. 4 and 8. In this case, the flywheel 5 is rotated
at a second speed dctermined by the diameter of the
urgcd por-tion of the small diaTneter portion 35a of
the motor pulley 35 for driving the tape lT at a corres-
ponding second speed.
When the cassette 1 is not loaded, like the
case where a cassette having the particular tape speed
specifying piece la, the switching of the tape speed is
not obtained by operating the tape speed setting knob
23. The functions of the lock lever 26 and lock release
knob 28 are the same as has been described earlier in
connection with the first embodiment and hence not
described here any further.
Second modification shown in ~i~s. 5. 6, 7 and 8
Figs. 5 and 6 show a modification of the
cassette tape recorder shown in ~igs. 3 and 4. In
this tape recorder, the lock lever 26 and lock release
knob 28 are omitted, and the recorder is adapted to
be stopped by manually operating tape speed setting knob
23 in the direction of the arrow C. In ~igs. 5 and 6
, .
the same parts as those in ~igs. 3 and 4 are designated
by like reference symbols, and which parts are not
described any further but only the different portion of
the construction will be described.
Designated at 44 is a notch formed in the
extension 15b of the link lever 15 and adapted to engage
with the pin 20 extending from the tape speed setting
.
.
1049989
1 lever 37. Mcanwhile, the select member 7 h~re is
adapted to be held in eithor one o:f two positionS by
means of a steel ball 45, which is adapted to be received
between one of two see-through holes 7b and 7c formed
in the select member 7 and a corresponding see-through
hole (not shown) formed in the base 8.
In the operation of this embodiment, when a
tape cassette 1 is mounted on reel bases 2 and 2', pin
39b provided on an auxiliary detecting lever ~9 is urged
: 10 by the rear end face of the cassette 1 to cause counter-
clockwise rotation of the lever 39 about the pin 40
. against the force of the spring 41. As a result the
engagement between the end portion 39a of the auxiliary
. detecting lever 39 and the corresponding end portion 38b
:,~
;. 15 of the detecting lever 38 is released, whereby the
1 detecti.ng lever 38 is rotated in the clockwise direction
:' by the spring 33 biasing the rotary arm 43. If the
. cassette 1 is provided with a particular tape speed
specifying piece la at this time, the detecting piece
. 20 38a of the detecting.lever 38 strikes and is stopped by
the specifying piece la. With the stopping of the clock-
. wise rotation of the detecting lever 38 no further counter-
. .
clockwise rotation of the rotary arm 43 coupled to the
~ detecting lever 38 is caused to cause no further counter-
:i 25 clockwise rotation of the link lever 15 coupled to the
pin 43b provided at the corresponding end of the rotary
arm 43. In other words, in this case the notch 44 pro-
vided in the extension 15b of the link lever 15 is not
. brought into engagement with the pin 20 extending from
the tape speed setting lever 37, as shown in Fi.g. 5.
"
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.,
: . , :.
1049989
1 Thus, even by operatlng the tape spced setting knob 23
in thi.s state to render the recorder into recording or
playback state the operati,ng force applied to the tape
speed setting knob 23 is not transmitted to the select
member 7, so that the initially available tape speed is
not switched.
If the cassette 1 loaded is not provided with
any particular tape speed specifying piece la, the detect-
ing piece 38a of the detecting lever 38 intrudes, with
rotatlon thereof, lnto the recess~b provided in the.
cassette, wlth the rotary arm 43 coming to be held at
: a position in engagement with the pin 34. At this time,
the pin 43b provided at the end of the rotary arm 43
is found at a position spaced from extension 15a of the
, , 15 link lever 15. l'hus, the notch 44 provided in the
extension 15b of the link lever 15, which is biased by . '
the tension spring 17 and tending to rotate about the
~ pin 16 in the clockwise direction, is brought into
'. engagement with the pin 20 extending from the tape speed
.. 20 setting lever 37. This state is shown in Fig. 6. In
the state of Fig. 6, by operating the tape speed setting
"' knob in the direction of the arrow D (for recording or
playback) or in the direction of the arrow C (for stopping)
, ,' the operating force is transmitted through the pir. 20,
' 25 the link lever 15 and link arm~¢ to the select member
,~,. 7 to cause movement thereof in the direction of the. ~
arrow A or in the direction of the arrow B.
.,
,~ When the select member 7 is moved in the
r
. direction of arrow B (or when a tape cassette 1 having
- 30 a parti.cular tape speed sepcifying piece la is loaded
, '
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10499~9
1 as shown in Fig. 5), motor pulley is brought to (or
held ln) its position shown in ~igs. 5 and 7, with its
lar~e diameter portion 35b ur~ed against the top of the
edge portion of the flywheel 5 by the leaf spring 36.
In this case, the flywheel 5 is rotated at a first
speed determined by the diameter of the urged portion
of the large diameter portion 35b of the motor pulley
35 for driving tape lT at a corresponding first speed.
On the other hand, when the select member 7
-'~ 10 is moved in the direction of arrow A, the motor 6 is
also moved in the same direction so that small diameter
portion 35a of the motor pulley 35 comes to be urged
, against the top of the edge portion of the flywheel 5
by the leaf spring 36, as shown in ~igs. 6 and 8. In
this case, the flywheel 5 is rotated at a second speed
; determined by the diameter of the ruged portion of the
small diameter portion 35a of the motor pulley 35 for
..
driving the tape lT at a corresponding second speed.
When the cassette 1 is not loaded, like the case where
a cassette having the particular tape speed specifying
piece la, the switching of the tape speed is not obtained
by operating the tape speed setting knob 23.
While in the preceding embodiments the switch-
ing of tape speeds has been effected by switching diffe-
rent diameter portions of the motor pulley 35 urgedagainst the flywheel 5 through the movement of the motor 6,
the same effects may be obtained by so arranging as to
switch the rpm of the motor itself.
!
.
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10~9989
1 Third modification shown in Fi ~rs~ g an~l 10
Fi~s. 9 and 10 show a fourth embodiment of
thc ca~ssette tape recorder according to the invention.
In this embodiment, thc switching of tape speeds i8
effected by switching the rpm of motor 6 itself. In
Figs. 9 and 10, the same parts as those in ~igs. 1 and
2 are designated by like reference symbols, and which
parts are not described any further but only the diffe-
rent portion of the construction will be described.
Designated at 46 is a control circuit for
controlling the rpm of the motor 6. Power from power
source terminals 47 is supplied to the motor 6 through
this control circuit 46. The motor 6 here is adapted
to be rotated at a first speed when a switch ~8 connected
to the control circuit 46 is turned "off" and rotated
at a second speed when the switch is turned "on". The
' switch 48 is on-off operated in an interlocked relation
to the movement of a tape speed select member 7' in the
directions of arrows A and ~ through the guide of guide
pins 9 and 10 extending upright from the base. In the
instant embodiment, the switch is turned "off" when
the select member 7' is moved in the direction of the
arrow A and is turned "on" with the movement of the
select member 7' in the direction of arrow B. The motor
6 is held at a fixed position, with a large diameter
portion 35b of motor pulley 35 fittedly secured to its
shaft always urged against flywheel 5.
In the operation of this embodiment, if a
tape cassette 1 which has a particular tape speed specify-
ing piece la provided at its rear end is mounted on reel
- 17 -
.
.
.',' ' ' ' '
1049989
1 bases 2 ~nd 2', as shown in Fig. 9, even by operatin~ -
the tape specd setting lever 19 in the direction of
arrow D (for recording or playback) the operating force
is not transmitted to the select member 7'. In this
case the switch 48 remains "off", so that the motor 6
is rotated at the first speed for driving tape lT.
If a tape cassette 1 not having a particular
tape speed specifying piece la is mounted on the reel
` bases 2 and 2' as shown in ~ig. 10, by operating the
tape speed setting lever 19 in the direction of arrow
D the operating force is transmitted through the pin
20, the link lever 15 and link arm 12 to the select
.~ member 7', causing movement thereof in the direction
of arrow A. As a result, the switch 48 is turned "on",
thus dictating the control circuit 46 to cause rotation
of the motor 6 at the second speed.
While some specific embodiments of the inven-
tion has been shown in the foregoing, it is to be under-
stood that various changes and modifications may be
readily made on these examples without departing from
the scope of the invention.
^ As has been shown in the foregoing, since
~i, according to the invention a detecting member is adapted
to detect a particular tape drive speed specifying means
which may be provided on a tape cassette for selecting
the particular speed depending upon the presence or
absence of the specifying means, it is possible to achieve
automatic selection or switching of constant tape drive
speeds in an interlocked relation to an action of setting
the tape speed for driving a tape at a constant speed.
- 18 -
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. v, . . . .
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10499~39
1 Al60, with ~,uch arran~ement that the pre~ence
or abc~ence of thc particu.lar tape speed specifying
means ls det;ected in an inlti,al stagre of` the actlon of
setting the tape speed for driving the tape at a con-
stant speed, lt is possible to ensure reliable selection
of the tape speeds.
Further, with such arrangement that the pre-
sence or absence of the particular tape speed specifying
means is detected with the loading of a tape cassette,
it is possible to ensure further reliable selection of
the tape speeds.
:
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' - 19 ~
