CA1049989A - Cassette tape recorder - Google Patents
Cassette tape recorderInfo
- Publication number
- CA1049989A CA1049989A CA248,071A CA248071A CA1049989A CA 1049989 A CA1049989 A CA 1049989A CA 248071 A CA248071 A CA 248071A CA 1049989 A CA1049989 A CA 1049989A
- Authority
- CA
- Canada
- Prior art keywords
- tape
- cassette
- speed
- constant
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/44—Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
Landscapes
- Automatic Tape Cassette Changers (AREA)
Abstract
CASSETTE TAPE RECORDER
ABSTRACT OF THE DISCLOSURE
A cassette tape recorder, in which the pre-sence or absence of a particular tape speed specifying means provided on a loaded tape cassette is detected by a detecting means, and with detection of absence of such specifying means a tape speed setting means for setting a recording or playback tape speed is coupled to a tape speed switching means to permit automatic switching of constant tape drive speeds in an interlocked relation to the operation of the record-ing or playback tape speed setting means.
ABSTRACT OF THE DISCLOSURE
A cassette tape recorder, in which the pre-sence or absence of a particular tape speed specifying means provided on a loaded tape cassette is detected by a detecting means, and with detection of absence of such specifying means a tape speed setting means for setting a recording or playback tape speed is coupled to a tape speed switching means to permit automatic switching of constant tape drive speeds in an interlocked relation to the operation of the record-ing or playback tape speed setting means.
Description
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.
~ 1 -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
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.
~ 1 -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
- 2 _ .- , . . , . ~: ~ . , ~
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
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 , ,. . .
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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 _ "' : :
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 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, .
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, ., .
.'~ ' .
. .
:. . . .
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 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 ..
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 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 .
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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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., : . , :.
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 , ' , , . - 15 -, '' ~
. .
.:: ' ' , ' :' 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 .
.
.',' ' ' ' ' 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.
.
. v, . . . .
~ , . . .
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.
:
' .
" .
' - 19 ~
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 , ,. . .
.
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 _ "' : :
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 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, .
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, ., .
.'~ ' .
. .
:. . . .
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 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 ..
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 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 .
.
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.
"
., : . , :.
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 , ' , , . - 15 -, '' ~
. .
.:: ' ' , ' :' 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.
!
.
- 16 ~
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 .
.
.',' ' ' ' ' 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.
.
. v, . . . .
~ , . . .
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.
:
' .
" .
' - 19 ~
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A cassette tape recorder comprising a detecting means for detecting the presence or absence of a parti-cular tape speed specifying means provided in a tape cassette loaded in the recorder, a means for driving the tape at a constant speed, a constant tape drive speed setting means coupled to said tape drive means for driving the tape at a constant speed, and a switching means for switching constant tape drive speeds, said constant tape drive speed setting means and said switch-ing means being adapted to be coupled to each other when a state for switching the constant tape drive speeds is detected by said detecting means.
2. The cassette tape recorder according to claim 1, wherein the presence or absence of a particular tape speed specifying means provided in a tape cassette is detected by said detecting means in an initial state of operation of said constant tape drive speed setting means.
3. The cassette tape recorder according to claim 1, wherein said detecting means includes a detecting member for detecting the presence or absence of a particular tape speed specifying means provided in a tape cassette and an auxiliary detecting member for rendering said detecting member operative in response to the loading of said tape cassette in the recorder, the detection of presence or absence of the particular tape speed specifying means provided in the tape cassette being thereby effected with the loading of the tape cassette.
4. The cassette tape recorder according to claim 1, wherein said switching means includes a control circuit for controlling the rotational speed of a motor for driving the tape and a switching member for switch-ing a control switch provided in said control circuit, whereby when said constant tape drive speed setting means and said switching means are coupled to each other through a coupling means with operation said constant tape drive speed setting means said control switch is switched by said switching member to switch the rotational speed of said motor for switching the constant tape drive speeds.
5. The cassette tape recorder according to claim 1, wherein said means for driving the tape at a constant speed includes a capstan and pinchroller arrangement for gripping the tape, a flywheel rotatable in unison with the capstan in said arrangement and a drive motor for driving said flywheel, the shaft of said motor being provided with a motor pulley fittedly secured to said shaft and having small diameter and large diameter portions adapted to be urged against said flywheel, and also wherein said switching means includes a switch-ing member carrying said motor secured thereto and movable in the direction of said motor shaft, whereby when said constant tape drive speed setting means and said switch-ing means are coupled to each other through a coupling means with operation of said constant tape drive speed setting means said switching member is moved to switch the different diameter portions of said motor pulley that is urged against said flywheel for switching the constant tape drive speed.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50033405A JPS51107109A (en) | 1975-03-18 | 1975-03-18 | TEEPURE KOODA |
| JP50033404A JPS51107108A (en) | 1975-03-18 | 1975-03-18 | TEEPURE KOODA |
| JP50033403A JPS51107107A (en) | 1975-03-18 | 1975-03-18 | KASETSUTOSHIKITEEPURE KOODA |
| JP50033406A JPS51107110A (en) | 1975-03-18 | 1975-03-18 | TEEPURE KOODA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1049989A true CA1049989A (en) | 1979-03-06 |
Family
ID=27459783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA248,071A Expired CA1049989A (en) | 1975-03-18 | 1976-03-17 | Cassette tape recorder |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1049989A (en) |
| DE (1) | DE2611322A1 (en) |
| GB (1) | GB1531594A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309727A (en) | 1978-11-16 | 1982-01-05 | Olympus Optical Co., Ltd. | Automatic reverse tape recorder with means for stopping the automatic reverse operation during recording |
| NL8101695A (en) * | 1981-04-07 | 1982-11-01 | Philips Nv | MAGNETIC BAND TAPE DEVICE. |
-
1976
- 1976-03-09 GB GB942276A patent/GB1531594A/en not_active Expired
- 1976-03-17 DE DE19762611322 patent/DE2611322A1/en active Pending
- 1976-03-17 CA CA248,071A patent/CA1049989A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1531594A (en) | 1978-11-08 |
| DE2611322A1 (en) | 1976-09-30 |
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