CA1213367A - Drive system of taperecorder - Google Patents
Drive system of taperecorderInfo
- Publication number
- CA1213367A CA1213367A CA000431243A CA431243A CA1213367A CA 1213367 A CA1213367 A CA 1213367A CA 000431243 A CA000431243 A CA 000431243A CA 431243 A CA431243 A CA 431243A CA 1213367 A CA1213367 A CA 1213367A
- Authority
- CA
- Canada
- Prior art keywords
- gear
- nick
- taperecorder
- waiting
- drive
- 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
- G11B15/10—Manually-operated control; Solenoid-operated control
-
- 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
- G11B15/093—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 driving condition of record carrier, e.g. travel, tape tension
-
- 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
- G11B15/442—Control thereof
Landscapes
- Transmission Devices (AREA)
Abstract
DRIVE SYSTEM OF TAPERECORDER
ABSTRACT OF THE DISCLOSURE
Tape running drive in a taperecorder and each operation other than changeover drive for selecting each operation mode, for example, the recording mode, reproducing mode or rewind mode etc. from the OFF mode of taperecorder are attained not with an electrical power but combination of a spring and a cam, thereby saving power consumption in each of these operations.
ABSTRACT OF THE DISCLOSURE
Tape running drive in a taperecorder and each operation other than changeover drive for selecting each operation mode, for example, the recording mode, reproducing mode or rewind mode etc. from the OFF mode of taperecorder are attained not with an electrical power but combination of a spring and a cam, thereby saving power consumption in each of these operations.
Description
This invention relates to a drive system for setting a taperecorder to each operating mode, for example, recording mode, reproducing mode, rewind mode or fast tape running mode etc. or setting these operating modes to the OFF state.
A taperecoder operates by selectively extracting rotat-ing force of a drive motor in accordance with a designated opeation mode. Such selection of operating mode has been realized individually with a large size electromegnetic plunger.
Since a conventional taperecorder has employed a large size electromegnetic plunger for each operation mode, and this plunger usually consumes a large amount of electrical power. Particularly in a portable type taperecorder, it is a notable disadvantage because the power source of battery is consumed within a comparatively short period of time.
Moreover, this electromagnetic plunger is required to generate a large attracting force and accordingly it becomes large in size using much copper and i~on material against a tendency to forming a small size and light weight tape-recorder.
In addition, this electromagnetic plunger generates, when it operates, a large impact sound, giving unpleasant feeling to an operator.
On the other hand, if power failure occurs, in a taperecorder which is driven by the commercially available lZ1336~ -power supply, and tehreby supply of elecrical power to a taperecorder stops and irregularly, a taperecorder stops its operation while the components are set in the driving condition. Accordingly, a tape may be broken, or smooth operation of components may also be lost because these components are placed abnormal conditions while receiving an excessive force.
This invention has been proposed to eliminate such dis-advantages and drawbacks of the prior arts. Namely, in the present invention, each operation mode is independently effectuated. In each operation, the stop mode is changed to the drive modè and the drive mode is always changed to the stop mode and is reset. Focusing on this operation cycle, a driving source of each operation mode is used in common for one drive system, which is composed of a nick gear and cam mechanism.
According to this structure, this invention is capable of drastically reducing power consumption by a taperecorder drive system. In the taperecorder employing this structure, switching to the stop mode from respective operation modes is carried out through a spring force and operation of cam without using any electrical power. If power supply is suspended irregularly, a taperecorder can be reset auto-matically to the stop mode.
This invention relates to a taperecorder drive system 1~133~7 and it is an object of this invention, in other words, to provide a more simplified taperecorder drive system.
It is another object of this iIlvention to provide a drive system which consumes less electrical power.
It is further object of this invention to prevent components of a taperecorder to be set to irregular stop mode, thereby assure said taperecorder to operate smoothly for a long period of time.
Thus, in accordance with a broad aspect of the invention, there is provided a drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a nick gear, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequentially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying~motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at ihe position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
In accordance with another broad aspect of the invention, there is provided a drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a first and a second nick gears arranged opposingly to each of said drive gears, each of such nick gear has the structure, wherein the first and second tsothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, and a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequentially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the - 3a -~21336~7 position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said sway-ing motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of a taperecorder driven by the drive system of this invention indicating the arrangement of components thereof.
Figure 2 is a plan view of an embodiment of the drive system of this invention.
Figure 3 is a plan view of the same embodiment indicating the operating conditions.
Figure 4 is a plan view of the other embodiment of the drive system of this invention.
Figure 5 is a plan view of other embodiment of a swaying motion driver.
Figure 6 is a plan view of still another embodiment of a swaying motion driver.
Figure 7 is a plan view of the principal portion of lock bar.
Figure 8 is a schematic circuit diagram in relation to - 3b -1;~13367 operation of the drive system of this invention.
Fig. 9 is vo-ltage waveforms indicating the timing chart.
FigO 10 is a mechanism for attaining the operation modes such as recording or reproducing mode.
Fig. 11 is a circuit diagram of an embodiment shown in Fig. 8.
Fig. 12 is a circuit diagram wherein a battery is used.
This invention is now described in detail by way of the preferred embodiment with reference to the drawings.
Fig. 1 is a plan view of the operation and functional part of a taperecorder comprising a drive system of this invention, wherein 50 denotes a schassis on which respective components are assembled.
At the upper surface of the chassis 50, a pair of shafts 51, 52 are erected with a predetermined interval pre-pared, which is equal to the distance between the centers of both reel hubs of a cassette tape to be set .
The shaft 51 is rotatably provided with a supply reel support 53 and an outer shaft 53a which may engage with the reel hub of a cassette tape, respectively. In the same way, the shaft 52 is also rotatably provided with a wind-up or take-up reel support 54 and an outer shaft 54a which may also engage with the reel hub of a cassette tape.
Provided between these shafts 51 and 52 are a first 1~3367 idler 57, which transfers a rotating force in the specified direction to said take-up reel support 54 through cntactness or isolation of its circumference to/from the circumference thereof, and a second idler 58, which transfers a rotating ~orce transferred to said first idler 57 to the supply reel support 53 as a rotating force in the opposite direction through contactness or isolation of its circumference to/from the circumference thereof. These idlers 57, 58 are rotatably assembled to the one end of an L-shaped lever which is also rotatably and movably mounted to the rear side of shassis 50 through a pin 56.
A capstan 61, rotatably erected on the surface of chassis 50 by way of a bearing 62, also serves as the rotat-ing shaft of a flywheel which is arranged at the rear side of chassis 50 and is driven by a drive motor 63.
The output shaft of drive motor 63 is fixed with a pulley 64. Moreover, a power transmitting belt 64' is extended through this pulley 64, flywheel 60 and a puelly 59 fixed coaxially to said first idler 57, and thereby the flywheel 60 and pulley 59 are driven by said drive motor 63.
In addition, a reversely L-shaped flat heading mounting board 66 is provided at the surface of chassis 50 in such a manner as is capable of sliding in the direction indicatged by the arrow mark Z shown in Fig.l.
A front piece 66a of this head mounting board 66 is 12~33~
provided with a recording/reproducing head 69, a pinch roller 67 which is placed in contact or isolated to/from said capstan 61 and a supporting means 68 which supports said pinch roller 67, while an end part of a side piece 66b of this head mounting board 66 is provided with a hook 71 which collides with an arm end 55a of a lever 55 in accord-ance with movement of the head mounting board 66, thus causing the lever 55 to rotate in such a direction as the first idler 57 isolates from the take-up reel support 54.
~ ere, a tensile spring 70 effectuates a tensile force to the head mounting board 66 so that it becomes non-opera-tive to the chassis 67, namely pressurized contact of pinch roller 67 to the capstan 61 is releasaed. Also provided between the lever 55 and chassis 50 is a tensile spring, although not shown in Fig. 1, which serves, using its elastic force, for rotating the lever 55 so that the first idler 57 is pressurized to be in contact with the take-up reel support 54.
This invnetion relates to a drive system for the ope-rational and functional part of a taperecorder described above and provides a following structure ~hereinafter refer to Fig. 2 and Fig. 3) that;
a drive gear fixed to the drive shaft 2 which is a rotating shaft of the flywheel 60 rotatably driven by the drive motor 63 and is integrated to said capstan 61, ~Z~3367 a nick gear 3, wherein the first and second toothless waiting domains 6-1 and 6-2 are formed at the circumference with a mutual positional relationship of a constant center angle (180 in the embodiment shown in the figure which is considered in the following description); the one among the circumference divided into two parts by these waiting domains 6-1, 6-2 is considered as the toothless portion 5 while the other as the gearing portion 4 which engages with said drive gear l; the first and second engaging step portions 11-1, 11-2 are provided at the edge with the mutual positional relationship in the center angle of 180 corres-ponding to said first and second waiting domains 6-1, 6-2, a cam plate 15 which is fixed to the rotating shaft 14 of such nick gear 3 and provides the cam surface 16 which sequentially and continuously reduces the distance to said rotating shaft 14 as the cam surface position B furthest from this rotating shaft 14 comes closer to the nearest cam surface position A, a lock bar 17 which is swayingly displaced properly by the swaying motion driver 19 while its end part is engaged with said engaging step portions 11-1, 11-2 at the position where said waiting domains 6-1, 6-2 are opposing to said drive gear l,and a operation link 21 which is swayingly fixed while the cam follower 22 provided at the end part is pressurizingly lZ~3367 in contact with said cam surface 16 are comprised, and the positional relationship of operation link 21 to the cam plate 15 is s~t so that said cam follower 22 is pressur-izingly in contact with said cam surface 16 at the position a little in this side of the position A or a litle other side of the position B when said waiting domains 6-1, 6-2 are opposed to said drive gear 1.
Since the drive gear 1 is integrated to the drive shaft
A taperecoder operates by selectively extracting rotat-ing force of a drive motor in accordance with a designated opeation mode. Such selection of operating mode has been realized individually with a large size electromegnetic plunger.
Since a conventional taperecorder has employed a large size electromegnetic plunger for each operation mode, and this plunger usually consumes a large amount of electrical power. Particularly in a portable type taperecorder, it is a notable disadvantage because the power source of battery is consumed within a comparatively short period of time.
Moreover, this electromagnetic plunger is required to generate a large attracting force and accordingly it becomes large in size using much copper and i~on material against a tendency to forming a small size and light weight tape-recorder.
In addition, this electromagnetic plunger generates, when it operates, a large impact sound, giving unpleasant feeling to an operator.
On the other hand, if power failure occurs, in a taperecorder which is driven by the commercially available lZ1336~ -power supply, and tehreby supply of elecrical power to a taperecorder stops and irregularly, a taperecorder stops its operation while the components are set in the driving condition. Accordingly, a tape may be broken, or smooth operation of components may also be lost because these components are placed abnormal conditions while receiving an excessive force.
This invention has been proposed to eliminate such dis-advantages and drawbacks of the prior arts. Namely, in the present invention, each operation mode is independently effectuated. In each operation, the stop mode is changed to the drive modè and the drive mode is always changed to the stop mode and is reset. Focusing on this operation cycle, a driving source of each operation mode is used in common for one drive system, which is composed of a nick gear and cam mechanism.
According to this structure, this invention is capable of drastically reducing power consumption by a taperecorder drive system. In the taperecorder employing this structure, switching to the stop mode from respective operation modes is carried out through a spring force and operation of cam without using any electrical power. If power supply is suspended irregularly, a taperecorder can be reset auto-matically to the stop mode.
This invention relates to a taperecorder drive system 1~133~7 and it is an object of this invention, in other words, to provide a more simplified taperecorder drive system.
It is another object of this iIlvention to provide a drive system which consumes less electrical power.
It is further object of this invention to prevent components of a taperecorder to be set to irregular stop mode, thereby assure said taperecorder to operate smoothly for a long period of time.
Thus, in accordance with a broad aspect of the invention, there is provided a drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a nick gear, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequentially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying~motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at ihe position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
In accordance with another broad aspect of the invention, there is provided a drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a first and a second nick gears arranged opposingly to each of said drive gears, each of such nick gear has the structure, wherein the first and second tsothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, and a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequentially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the - 3a -~21336~7 position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said sway-ing motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of a taperecorder driven by the drive system of this invention indicating the arrangement of components thereof.
Figure 2 is a plan view of an embodiment of the drive system of this invention.
Figure 3 is a plan view of the same embodiment indicating the operating conditions.
Figure 4 is a plan view of the other embodiment of the drive system of this invention.
Figure 5 is a plan view of other embodiment of a swaying motion driver.
Figure 6 is a plan view of still another embodiment of a swaying motion driver.
Figure 7 is a plan view of the principal portion of lock bar.
Figure 8 is a schematic circuit diagram in relation to - 3b -1;~13367 operation of the drive system of this invention.
Fig. 9 is vo-ltage waveforms indicating the timing chart.
FigO 10 is a mechanism for attaining the operation modes such as recording or reproducing mode.
Fig. 11 is a circuit diagram of an embodiment shown in Fig. 8.
Fig. 12 is a circuit diagram wherein a battery is used.
This invention is now described in detail by way of the preferred embodiment with reference to the drawings.
Fig. 1 is a plan view of the operation and functional part of a taperecorder comprising a drive system of this invention, wherein 50 denotes a schassis on which respective components are assembled.
At the upper surface of the chassis 50, a pair of shafts 51, 52 are erected with a predetermined interval pre-pared, which is equal to the distance between the centers of both reel hubs of a cassette tape to be set .
The shaft 51 is rotatably provided with a supply reel support 53 and an outer shaft 53a which may engage with the reel hub of a cassette tape, respectively. In the same way, the shaft 52 is also rotatably provided with a wind-up or take-up reel support 54 and an outer shaft 54a which may also engage with the reel hub of a cassette tape.
Provided between these shafts 51 and 52 are a first 1~3367 idler 57, which transfers a rotating force in the specified direction to said take-up reel support 54 through cntactness or isolation of its circumference to/from the circumference thereof, and a second idler 58, which transfers a rotating ~orce transferred to said first idler 57 to the supply reel support 53 as a rotating force in the opposite direction through contactness or isolation of its circumference to/from the circumference thereof. These idlers 57, 58 are rotatably assembled to the one end of an L-shaped lever which is also rotatably and movably mounted to the rear side of shassis 50 through a pin 56.
A capstan 61, rotatably erected on the surface of chassis 50 by way of a bearing 62, also serves as the rotat-ing shaft of a flywheel which is arranged at the rear side of chassis 50 and is driven by a drive motor 63.
The output shaft of drive motor 63 is fixed with a pulley 64. Moreover, a power transmitting belt 64' is extended through this pulley 64, flywheel 60 and a puelly 59 fixed coaxially to said first idler 57, and thereby the flywheel 60 and pulley 59 are driven by said drive motor 63.
In addition, a reversely L-shaped flat heading mounting board 66 is provided at the surface of chassis 50 in such a manner as is capable of sliding in the direction indicatged by the arrow mark Z shown in Fig.l.
A front piece 66a of this head mounting board 66 is 12~33~
provided with a recording/reproducing head 69, a pinch roller 67 which is placed in contact or isolated to/from said capstan 61 and a supporting means 68 which supports said pinch roller 67, while an end part of a side piece 66b of this head mounting board 66 is provided with a hook 71 which collides with an arm end 55a of a lever 55 in accord-ance with movement of the head mounting board 66, thus causing the lever 55 to rotate in such a direction as the first idler 57 isolates from the take-up reel support 54.
~ ere, a tensile spring 70 effectuates a tensile force to the head mounting board 66 so that it becomes non-opera-tive to the chassis 67, namely pressurized contact of pinch roller 67 to the capstan 61 is releasaed. Also provided between the lever 55 and chassis 50 is a tensile spring, although not shown in Fig. 1, which serves, using its elastic force, for rotating the lever 55 so that the first idler 57 is pressurized to be in contact with the take-up reel support 54.
This invnetion relates to a drive system for the ope-rational and functional part of a taperecorder described above and provides a following structure ~hereinafter refer to Fig. 2 and Fig. 3) that;
a drive gear fixed to the drive shaft 2 which is a rotating shaft of the flywheel 60 rotatably driven by the drive motor 63 and is integrated to said capstan 61, ~Z~3367 a nick gear 3, wherein the first and second toothless waiting domains 6-1 and 6-2 are formed at the circumference with a mutual positional relationship of a constant center angle (180 in the embodiment shown in the figure which is considered in the following description); the one among the circumference divided into two parts by these waiting domains 6-1, 6-2 is considered as the toothless portion 5 while the other as the gearing portion 4 which engages with said drive gear l; the first and second engaging step portions 11-1, 11-2 are provided at the edge with the mutual positional relationship in the center angle of 180 corres-ponding to said first and second waiting domains 6-1, 6-2, a cam plate 15 which is fixed to the rotating shaft 14 of such nick gear 3 and provides the cam surface 16 which sequentially and continuously reduces the distance to said rotating shaft 14 as the cam surface position B furthest from this rotating shaft 14 comes closer to the nearest cam surface position A, a lock bar 17 which is swayingly displaced properly by the swaying motion driver 19 while its end part is engaged with said engaging step portions 11-1, 11-2 at the position where said waiting domains 6-1, 6-2 are opposing to said drive gear l,and a operation link 21 which is swayingly fixed while the cam follower 22 provided at the end part is pressurizingly lZ~3367 in contact with said cam surface 16 are comprised, and the positional relationship of operation link 21 to the cam plate 15 is s~t so that said cam follower 22 is pressur-izingly in contact with said cam surface 16 at the position a little in this side of the position A or a litle other side of the position B when said waiting domains 6-1, 6-2 are opposed to said drive gear 1.
Since the drive gear 1 is integrated to the drive shaft
2 of the flywheel 60, it is always rotating, in the condi-tion that the power switch of a taperecorder is turned ON, together with the drive motor 63 which is driven when the power source of taperecorder is supplied.
The nick gear 3 makes a half-turn when the gearing portion 4 engages with the drive gear 1, and this half-turn causes the cam plate 15 to also make a half-turn, giving the specified swaying displacement to the operation link 21.
But this nick gear 3 is not rotated by only the drive gear 1 and is also rotatingly displaced, on the contrary, by the operation link 21 through the function of cam plate 15.
Namely, the nick gear 3 is rotatingly driven by the drive gear 1 only when its gearing portion 4 engages with the drive gear 1 but is rotated by the operation link 21 in other case.
This nick gear 3 provided with the first and second waiting domains 6-1, 6-2 and the first and second engaging i2~3367 step portions 11-1, 11-2, but there is no any direct mutual positional restriction between these waiting domains 6-1, 6-2 and the engaging step portions 11-1, 11-2 other than that the end part of lock bar 17 engages with the one engaging step portion 11 when the one waiting domain 6 is opposed to the drive gear 1.
In the case of an embodiments shown in Fig. 2 and Fig.3, the engaging step portions 11 are formed in such a manner that a circumferencial groove 8 is formed by cutting at the end surface of the nick gear 3 and a projecting piece 12 is projected toward the external surface of groove 10 at the point nearest to said waiting domain 6 at the internal surface 9 of said goorve 8.
This engaging step portion 11 is engaged with the end part of lock bar 17 when the waiting domain 6 of the nick gear 3 is rotated to the position opposing to the drive gear 1, owing to arrangement of lock bar 17 and the positional relationship of both engaging step portions 11.
The lock bar 17 is assembled, at its base end, to the swaying motion driver 19 which causes it to swavingly dis-place. As shown in Fig. 7, the end part of lock bar 17 is bend so tht it can be positioned within the cincumferencial groove 8 and a engaging piece 18 engages wi~h said engaging step portions 11.
The swaying motion driver 19 causes the lock bar 17 to ~Z13367 swayingly displace in order to release engagement between the engaging piece 18 and the engaging step portions 11. As a typical swaying motion driver, as shown in Fig.5, the lock bar 17 is rotatably assembled to the frame l9b, an electro-magnetic solenoid l9a is mounted to said frame l9b, when this electro-magnetic solenoid 18a is excited, it attracts the base portion of the lock bar 17, thereby causing the specified swaying operation to the lock bar 17. In addition to such electro-magnetic solenoid l9a, a device shown in Fig. 6 can also be used wherein the base end of lock bar 17 cosisting of a metal plate is fixed to the base body l9c, the metal ceramics l9d, l9d are laminated on both sides of this lock bar 17, a positive potential is applied to the one ceramic l9d, while a negative potential to the other ceramic l9d, thereby the lock bar 17 i S swayingly displayed.
Moreover, it may also be replaced with a recently developed element which shows companding deformation due to an effect of a magnetic force.
The lock bar 17 is further provided with a return spring 20, by which it is swayingly returned to the initial position so that after it is swayingly displayed by the swaying motion driver 19 in order to release the engagement with the one engaging step portion 11, the nick gear 3 makes a half-turn and accurately engages with the other engaging step portion 11.
1~13367 Just like a return spring 20, a return projecting part 13 which forcibly displace the engaging pice 18 toward the intenal surface of groove 9 is provided at the external surface of groove 10 which is positioned before the engaging step portions 11 along the rotating direction of nkck gear 3 so that the end part of lock bar 17 accurately engages with the engaging step portions 11 and the nick gear 3 is there-fore capable of accurately suspending the rotating operation owing to the lock bar 17.
The operation link 21, which is swayingly displaced by rotation of nick gear 3 and such swaying displacement is used as a driving force of each operation of a taperecorder, is assemnbled with a tension spring which always pressurizes the cam follower 22 provided at the end part of this ope-ration link 21 to the cam surface 16, and the base end thereof is pivotted to the non-movable portion, such as chassis, at the fulcrum 23.
In the embodiments shown in Fig. 2 and Fig. 3, swaying displacement of the operation link 21 is extracted by the operation arm 25 integrated to this operation link 21 and an operation spring 26 and an operation bar 28 are provided at the end of this operation arm 25.
Opposing to this operation link 21, a changeover switch 27 is provided as a detecting means in order to detect that the changeover operation of drive system is carried out by lZ13367 detecting a swaying displacemen~ of the operation link 21, naemely the rotating operation of the nick gear 3.
In other words, the changeover operation of operating condition by this invention is attained by that engagement between the engaging piece 18 and engaging step portion 11-1 is released by swaying displacement of the lock bar 17 due to the operation of swaying motion driver 19 and thereby the nick gear 3 rotatingly displaces. Whether the operation changeover of a drive system has been performed correctly or not is known by detecting a rotating displacement of this nick gear 3 by proper means.
The embodiments of Fig. 2 and Fig. 3 are structured so that rotating displacement of this nick gear 3 is attained by detecting swaying displacement of the operation link 21 with the changeover switch 27, and this changeover switch 27 controls supply of power source to the swaying motion driver 19 through its swithing operation, thereby preventing supply of unwanted electrical power to such swaying motion driver 19 .
In above structure of the embodiments shown in Fig. 2 and Fig. 3, when engagement between the engaging piece 18 and the first angaging step portion 11-1 is released by swayingly displacing the lock bar 17 by operating the swaying motion driver 19 from the non-operating condition where the drive gear 1 is opposing to the first waiting do-~Z13367 main 6-1 and the engaging piece 18 is engaged with the engaging step portion 11-1, the nick gear 3 slightly rotates clockwise in Fig. 2 due to the pressurized contact thereof to a position on the cam surface 16 a little before the position A of the cam follower 22. Thereby, the gearing portion 4 engages with the drive gear 1 and the nick gear 4 is forcibly rotated clockwise by the drive gear 1.
Forcible rotation of nick gear 3 by this drive gear 1 causes the cam plate 15 to rotate together with the nick gear 3, and the operation link 21 of which cam follower 22 provided at the end thereof is pressurizingly in contact with the cam surface 16 is swayingly rotated in accordance with the shape of this cam surface 16 and thereby a dis-placement for operation can be extracted through the operation arm 25.
When the drive gear 1 is positioned opposingly to the second waiting domain 6-2 after the nick gear 3 makes a half turn, the engaging piece 18 engages with the second engaging step portion 11-2, forcibly suspending rotation of the nick gear and maintaning the operating condition shown in ~ig. 3.
At this time, the cam follower 22 is pressurizingly in contact with the cam surface 16 at the position a little exceeding the position B, effectuating a divided vector force causing the nick gear 3 to rotate clockwise on the cam plate 15.
.
121336~7 When engagement with the second engaging step portin 11-2 of the engaging piece 18 is released by operating the swaying motion driver 19 from the operating condition shown in Fig. 3, the nick gear 3 rotates clockwise due to the effect of cam plate 15 and cam follower 22 and returns to the non operating condition shown in Fig. 2.
A stop tooth 7 provided at the boundary of the tooth-less portion 5 and the first waiting domain 6-1 is provided for absorbing a rotating inertia of the nick gear 3 which ratatingly displaces under the idle condition from said ope-rating condition to the non-operating condition.
Because of rotation of said nick gear 3, the operation link 21 also returns making zero the displacement for ope-ration and thereby a taperecorder changes the operation mode from operation mode to non-operation mode.
As is obvious from description of operations, the swaying motion driver 19 is required only to swayingly dis-place the lock bar 17 for extremely short period of time and therefore it consumes only a lit~le amount of power. As shown in Fig. 2, accordingly, the changeover switch 27 which changes the switching condition in accordance with the sway-ing displacement of the operation link 21 is provided and as shown in Fig. 8 and Fig. 11, any one of the swaying motion driver 19 and a capacitor C as the power source of such swaying motion driver 19 is connected to the power supply by means of said changeover switch 27, while the other is iso-lated from the power supply.
Namely, in the case of an embodiment shown in Fig. 8, the contact piece of changeover switch 27 is in contact with the one contact 27a in the non-operating condition shown in Fig. 1, connecting the swaying motion driver 19 to the power supply terminal V.
When the power switch of a taperecorder is turned ON, a positive voltage is applied to the terminal V but since the transistor Vrl is not turned ON, a power is not supplied to the swaying motion driver 19.
When a signal (this signal is positive) is applied to the terminal PLY, a base current flows into the base of the transistor Trl through a resistor rl. Therefore, the tran-sistor Trl turns ON and thereby a power source is supplied to the swaying motion driver 19. Now, the swaying motion driver 19 starts operation.
When the swaying motion driver 19 operates, the nick gear 3 rotates, causing the operation link 21 in accordance therewith, resulting in the specified displacement.
When the operation link 21 sways, the changeover switch 27 changes the contact piece from the contact 27a to 27b, separating the swaying motion driver lg from the power supply and connecting a capacitor C to the power supply in order to charge it with the porality shown in Fig. 8.
1~1336~ -Namely, as shown in Fig. 9, when a PLY input Vp shown in Fig. 9(a) is applied to the terminal PLY at the time t when the power switch is turned ON, an input Vs shown in Fig. 9(c) is input to the swaying motion driver 19 at the time tl.
However, when the swaying motion driver 19 operates, the nick gear 3 ortates and thereby the changeover switch 27 operates as specified ata the time t2 due to the swaying operation of the operation link 21 at the timing shown in Fig. 9(b). Accordingly, input to the swaying motion driver 19 stops at the time t2.
As described above, when the nick gear 3 rotates, the drive system changes the condition to that shown in Fig. 3 from that of Fig. 2 and the specified operating condition is maintained.
In this condition, since the changeover switch 27 places the contact piece to the side of contact 27b and the input of control circuit IC is set to a high level because an PLY input is applied, a positive voltage is not applied to the base of transistor Tr2, and therefore the transistor Tr2 is in the OFF state. Accordingly, thje swaying motion driver 19 is held in the no-input condition.
When the PLY input is suspended in such an perating condition, an input of the control circuit IC becomes low level. A signal is applied to the base of transistor Tr2 lZ133~7 through the resistor r2, and the transistor Tr2 turns ON.
At this time, since the contact piece of changeover switch 27 is located in the side of contact 27c, a closed loop is formed through the capacitor C, swaying motion driver 19 and transistor Tr2. Thus, the swaying motion driver 19 operates, the engaging piece 18 of lock bar 17 momentarily releases from the engaging step portion 11-2, the nick gear 3 rotates, owing to the effect of cam plate 15 and cam follower 22 and the condition returns to the non-operating state shown in Fig. 2.
On the occasion of above operation, since the operation link 21 also sways, the changeover switch 27 places the contact piece to the contact 27a and waists for the next operation. But, since the PLY input is suspended, no input , ..
is given to the base of transistor Trl and the circuit remains in the open condition at the beginning.
Here,if power failure occurs or the power supply plug is disconnected during the PLY operation, the power supply becomes OFF. Accordingly, a voltage of power supply termi-nal V drops preceding the voltage of capacitor C and simultaneously a voltage of PLY terminal drops. Therefore a voltage of capacitor C input as a high level signal to the base of transistor Tr2 due to the effect of control circuit IC. Thereby, the swaying motion driver 19 operates, causing the nick gear 3 to make half-turn from the condition shown 121336'~
in Fig. 3 to the condition shown in Fig. 2. Of course, the drive gear 1 is not required to drive during this half-turn.
The embodiment shown in Fig. 2 and Fig. 3 is intended to attain all changeover operations of a taperecorder through combination of the one nick gear 7 and drive gear 1.
As a transmitting mechanism for changeover operation energy to be combined to the embodiment shown in Fig. 2 and Fig. 3, the structu-re shown in Fig. 10 is available.
In Fig.10, the operation bar 28 described previously is pivotted at the end of operation arm 25 of the operation link 21 and the operation spring 26 is provided at the end of operation bar 28.
Provided at the side of operation bar 28 with the spe-cified interval are a projected engaging piece 29 for play, projected engaging piece 30 for rewind and a projected engaging piece 31 for fast supply of tape, to which the corresponding operation links 32, 33, 34 are opposingly provided.
In the embodiment of Fig. 10, the operation link 32 for play and operation link 33 for rewind move toward the operation bar 28 when they are excited by the motion driver 35, 36, fort example, like an electromagnetic solenoid provides in the vicinity of them and displace until they engage with the engaging pieces 29, 30, respectively. The engaging piece 31 for fast supply of tape is fixed at both ~213367 sides with the ceramic bimetal 37 and displaces when the specified voltage is applied so that it engages with the engaging piece 31. The operation links 32, 33, 34 are moreover coupled with the operation spring 38 for play, operation spring 39 for rewind and operation spring 40 for fast supply of tape. Therefore, then the operation links 32, 33, 3~ operate respectively for the specified displace-ment, the specified mechanisms operate respectively.
Accordingly the operation mode such as PLAY mode starts and is continued.
Fig. 11 is an embodiment of the circuit structure for obtaining said operations. The switches 41, 42 43 respect-ively operate the driving bodies 35, 36 or the ceramic bimetal 37 and also operate the swaying motion driver 19.
For examaple, when the power switch of a taperecorder is turned ON and the switch 41 is turned ON from the waiting condition of Fig. 1, since the changeover switch 27 is con-nected to the one contact 27a, a power source i5 supplied to the swaying motion driver 19. When it operates, the motion driver 35 for play also operates causing the operation link 32 for play to displace toward the operation bar 28 as described above. Thereby, it becomes ready for engaging with the engaging piece 29 for play.
On the other hand, as in the case of above embodiment, the nick gear 3 makes half-turn by the operation of the 1~13367 swyaing motion driver 19. Therefore,the operation link 21 sways, changing over the switch 27 to the contact 27b, simultaneously pulling the operation bar 28 to the left side in Fig. 10 through the operation arm 35, thus causing the operation link 32 which is already engaged with the engaging piece 29 for play to rotatingly displace. Accordingly the play mechanism for play starts the specified operation and continues it through the operation spring 38 for play.
When the changeover switch 27 is switched to the contact 27b, the base current of transistor Tr2 is by-passed to the earth and enters the turn OFF state, suspending supply of power to the swaying motion driver 19 and drive body 35 for play, and only the capacitor C in the circuit of Fig. 11 is charged.
When the specified operation terminates and the switch 41 is turned OFF, since the changeover switch 27 is swi~ched to the contact 27b, a charging current of capacitor C is partly supplied to the base of transistor Tr2 passing the resistors R2, R3, setting it to the trigger condition.
Therefore, a closed loop is formed through the positive side of capacitor C, collector of transistor Tr2, emitter of the same, swaying motion driver 19 and the negative side of capacitor C. Now, the charges of capacitor C is released to the swaying motion driver 19 and thereby it starts operat-ion. Thus, the nick gear 3 returns to the state of Fig. 1 ~213367 and simultaneously the operation bar 2~ and operation spring 38 for play also return to the state of Fig. 10.
Fig. 12 shows an example of the battery type circuit.
As a power supply, a battery 44 is used. The swaying driv-ing body 19 is connected with a position sensor 45 as a detecting means and the controller 46 comprising a start switch 46a and stop switch 46b.
When operation has completed, the switch of position sensor 45 is in the waiting condition while it is in contact with the contact 45a. When the start switch 46a of control-ler turns ON, the swaying motion driver 19 operates, but the switch of position sensor 45 is in the waiting condition while it is in contact with the contact 45b. When the the stop switch 46b of controller 46 turns ON (simultaneously the start switch 46a is turned OFF) afther the specified operation terminates, the swaying motion driver lg operates again and the switch of position sensor 45 is switched to the contact 45a.
Therefore, when the specified operatioin is activated by the swaying motion driver 19, any electrical power is not supplied during operation. Here, in above description, the drive gear 1 is provided with one nick gear 3 and all changeover operations are attained by the rotating operation of such one nick gear 3. But, as shown in Fig. 4, it is also possible to assemble a pair of nick gears 3,3 to one lZ13367 drive gear 1 and thereby to more simply and directly extract a changeover power from these nick gears 3,3.
In other words, in the embodiment shown in Fig. 4, the structure of nick gear 3 and the combined structure of the drive gear 1, nick gear 3, swaying motion driver 19, lock bar 17 and operation link 21 are the same as those of embodiments shown in Fig. 2 and Fig. 3, and the operations of the structure is also the same as that of embodiments shown in Fig. 2 and Fig. 3. Therefore, detail description of them is omitted here. But in the embodiment of Fig. 4, the lower nick gear 3A is provided as the driving means for recording, reproducing and fast supply of tape, while the upper nick gear 3B for rewind mode.
The end part of both lock bars 17 is extended and a coupling rod 80 is assembled for bridging over the end parts of both lock bars 17.
This coupling rod 80 prevents, when the one nick gear 3 is executing the changeover operation, the other nick gear 3 to start the changeover operation. When the one lock bar 17 is swayingly rotated by the swaying motion driver 19, releass~ engagement of its engaging piece 18 with the engaging step portion 11-1 or 11-2, the coupling rod 80, of which one end is coupled to the end of the lock bar 17, engages the other end with the end part of the other lock bar 17. Thereby, it holds the other lock bar 17 disabling to swayingly displace in such a direction as releasing engagment of the engaging piece 18 thereof with the engaging step portions 11-1, 11-2.
In order to make it more reliable through this coupling rod 80 to prevent almost simultaneous changeover operations by both nick gears 3, it is preferable, as shown in Fig. 4, to form the portion in the range from 10 to 1~ in terms of the cneter angle from the engaging step portions 11-1, 11-2 among the internal surface of groove 9 of the nick gear 3 in the same curvature of radius as that of the projected end of the engaging step portions 11-1, 11-2, so that the lock bar 17 can no longer swayingly return within this range.
In Fig. 4, the one end of operation link 21 assembled to the nick gear 3A serving as the changeover means for recording, reproduction and fast supply of tape is connected with the one end of operation spring 26 and the other end of this operation spring 26 is connected with the head mounting board 66.
Since a spring force of the operation spring 26 is set more forcibly than a spring force of the tensile spring 70 (refere to Figa 1), when the operation link 21 assembled to the nick gear 3A is swayingly displaced clockwise in Fig. 4 due to the rotation of such nick gear 3A, a tensile force is transferred to the head mounting board 66 through the ope-ration spring 26 and the head mounting board 66 slidingly ~Z133~7 moves upward in Fig. 1 owing to such tensile force, opposing to a spring force of the tensile spring 70, causing the pinch roller 67 to be pressed toward the capstan 61 and thereby changing the operation mode to the recording or re-production or fast supply of tape.
On the other hand, when the nick gear 3B for rewind rotates, the operation link 21 assembled to the nick gear 3B
for rewind sways clockwise in Fig. 4 around the fulcrum 23.
Thereby, a tension plate 81 working as the operation spring 26 assembled to the one end of this operation link 21 effectuates a pressing force on the arm end 55a of the lever 55, against a spring force of the tensile spring 82 omitted in Fig. 1. Thereby pressurized contact of this lever 55 to the circumference surface of reel support 54 of the first idler 57 provided to said lever 55 is released and simul-taneously the second idler 58 is caused to be pressurizing-ly in contact with the circumference surface of the reel support 53, rotatingly driving the reel-support 53 in the rewind direction.
At this time, a rotating force is transmitted to the reel 53 by the following procedures. Namely, when the second idler 58 is pressurized to the circumference surface of the reel support 53, the second idler 58 which is allowing the rotating shaft thereof to freely engage with a play with an elongated hole of the lever 55 moves to the first idler 57 causing the circumference surface thereof to be pressuringly in contact with the circumference surface of the first idler 57, thereby a rotating force of the first idler 57 rotatingly driven by the drive motor 63 is trans-mitted to the reel support 53.
In the embodiment shown in Fig.4, the drive system of this invention detects the changeover operating condition.
Namely,a detecting means which detects that the nick gear 3 is rotatingly displaced is omitted but as described above it is enough for the detecting means to detect that the nick gear has started the rotating operatino, namely, the change-over operation is carried out. Therefore, its structure and mounting place are not restricted. It may be structured, as in the case of the embodiments shown in Fig. 2 and Fig. 3, as a changeover switch 27 which is provided opposing to the operation link 21 to be swayingly displaced in accordance with rotation of nick gear 3, or as detecting that the head 69 (refere to Fig. 1) is pressurizingly in contact with the recording tape, or as directly detecting by the cam plate 15 that the nick gear 3 is certainly displaced rotatingly.
In any case, changeover operation of the drive system of this invention is carried out by the operation of the swaying motion driver 19 in this detecting means.
Therefore, it must be confirmed by any means that the nick gear 3 has certainly rotated after the operation instruction i2~3367 is issued to the swaying motion driver 19. When it is confirmed, accurate and reliable operation of the operational and functional part of a taperecorder can be obtained.
As described above, a drive system of this invention has eliminated an electro-maganetic plunger as a drive source of the changeover operation of the operational and functional part and saved thereby a large amount of power consumption. Moreover, such changeover operation is realized with low noise without generating an impact sound.
Particularly any electrical power is not consumed for reset to the waiting state from each operating mode.
Owing to this advantage, if electrical power supply is suspended irregularly due to power failure etc., the drive system of this invention is capable of automatically reset-ting the operational and functional part automatically to the waiting state.
Moreover, since start of changeover operation can be attained automatically by releasing engagement of the engaging piece 1~ with the engaging step portions 11-1, 11-2 through a slight swaying displacement by the swaying motion driver 19 of lock bar 17, this changeover operation start can be detected more reliably. Thereby, more reliable and smooth changeover operation can be obtained.
What is more, since each changeover operation uses a lzl~3l67 rotating force obtained from the drive motor 63 as a driving source, any impact noise is not generated different from the conventional means during the changeover operation and all changeover operations can be attained with electrical instructions. Thereby, diversified disadvantages resulting from mechanical impact can perfectly be eliminated.
Further, the mechanical components for changeover ope-rations can all be provided concentrately to this drive system section. Therefore, the mechanical structure of the changeover function part in a taperecorder can be fantasti-cally simplified.
The nick gear 3 makes a half-turn when the gearing portion 4 engages with the drive gear 1, and this half-turn causes the cam plate 15 to also make a half-turn, giving the specified swaying displacement to the operation link 21.
But this nick gear 3 is not rotated by only the drive gear 1 and is also rotatingly displaced, on the contrary, by the operation link 21 through the function of cam plate 15.
Namely, the nick gear 3 is rotatingly driven by the drive gear 1 only when its gearing portion 4 engages with the drive gear 1 but is rotated by the operation link 21 in other case.
This nick gear 3 provided with the first and second waiting domains 6-1, 6-2 and the first and second engaging i2~3367 step portions 11-1, 11-2, but there is no any direct mutual positional restriction between these waiting domains 6-1, 6-2 and the engaging step portions 11-1, 11-2 other than that the end part of lock bar 17 engages with the one engaging step portion 11 when the one waiting domain 6 is opposed to the drive gear 1.
In the case of an embodiments shown in Fig. 2 and Fig.3, the engaging step portions 11 are formed in such a manner that a circumferencial groove 8 is formed by cutting at the end surface of the nick gear 3 and a projecting piece 12 is projected toward the external surface of groove 10 at the point nearest to said waiting domain 6 at the internal surface 9 of said goorve 8.
This engaging step portion 11 is engaged with the end part of lock bar 17 when the waiting domain 6 of the nick gear 3 is rotated to the position opposing to the drive gear 1, owing to arrangement of lock bar 17 and the positional relationship of both engaging step portions 11.
The lock bar 17 is assembled, at its base end, to the swaying motion driver 19 which causes it to swavingly dis-place. As shown in Fig. 7, the end part of lock bar 17 is bend so tht it can be positioned within the cincumferencial groove 8 and a engaging piece 18 engages wi~h said engaging step portions 11.
The swaying motion driver 19 causes the lock bar 17 to ~Z13367 swayingly displace in order to release engagement between the engaging piece 18 and the engaging step portions 11. As a typical swaying motion driver, as shown in Fig.5, the lock bar 17 is rotatably assembled to the frame l9b, an electro-magnetic solenoid l9a is mounted to said frame l9b, when this electro-magnetic solenoid 18a is excited, it attracts the base portion of the lock bar 17, thereby causing the specified swaying operation to the lock bar 17. In addition to such electro-magnetic solenoid l9a, a device shown in Fig. 6 can also be used wherein the base end of lock bar 17 cosisting of a metal plate is fixed to the base body l9c, the metal ceramics l9d, l9d are laminated on both sides of this lock bar 17, a positive potential is applied to the one ceramic l9d, while a negative potential to the other ceramic l9d, thereby the lock bar 17 i S swayingly displayed.
Moreover, it may also be replaced with a recently developed element which shows companding deformation due to an effect of a magnetic force.
The lock bar 17 is further provided with a return spring 20, by which it is swayingly returned to the initial position so that after it is swayingly displayed by the swaying motion driver 19 in order to release the engagement with the one engaging step portion 11, the nick gear 3 makes a half-turn and accurately engages with the other engaging step portion 11.
1~13367 Just like a return spring 20, a return projecting part 13 which forcibly displace the engaging pice 18 toward the intenal surface of groove 9 is provided at the external surface of groove 10 which is positioned before the engaging step portions 11 along the rotating direction of nkck gear 3 so that the end part of lock bar 17 accurately engages with the engaging step portions 11 and the nick gear 3 is there-fore capable of accurately suspending the rotating operation owing to the lock bar 17.
The operation link 21, which is swayingly displaced by rotation of nick gear 3 and such swaying displacement is used as a driving force of each operation of a taperecorder, is assemnbled with a tension spring which always pressurizes the cam follower 22 provided at the end part of this ope-ration link 21 to the cam surface 16, and the base end thereof is pivotted to the non-movable portion, such as chassis, at the fulcrum 23.
In the embodiments shown in Fig. 2 and Fig. 3, swaying displacement of the operation link 21 is extracted by the operation arm 25 integrated to this operation link 21 and an operation spring 26 and an operation bar 28 are provided at the end of this operation arm 25.
Opposing to this operation link 21, a changeover switch 27 is provided as a detecting means in order to detect that the changeover operation of drive system is carried out by lZ13367 detecting a swaying displacemen~ of the operation link 21, naemely the rotating operation of the nick gear 3.
In other words, the changeover operation of operating condition by this invention is attained by that engagement between the engaging piece 18 and engaging step portion 11-1 is released by swaying displacement of the lock bar 17 due to the operation of swaying motion driver 19 and thereby the nick gear 3 rotatingly displaces. Whether the operation changeover of a drive system has been performed correctly or not is known by detecting a rotating displacement of this nick gear 3 by proper means.
The embodiments of Fig. 2 and Fig. 3 are structured so that rotating displacement of this nick gear 3 is attained by detecting swaying displacement of the operation link 21 with the changeover switch 27, and this changeover switch 27 controls supply of power source to the swaying motion driver 19 through its swithing operation, thereby preventing supply of unwanted electrical power to such swaying motion driver 19 .
In above structure of the embodiments shown in Fig. 2 and Fig. 3, when engagement between the engaging piece 18 and the first angaging step portion 11-1 is released by swayingly displacing the lock bar 17 by operating the swaying motion driver 19 from the non-operating condition where the drive gear 1 is opposing to the first waiting do-~Z13367 main 6-1 and the engaging piece 18 is engaged with the engaging step portion 11-1, the nick gear 3 slightly rotates clockwise in Fig. 2 due to the pressurized contact thereof to a position on the cam surface 16 a little before the position A of the cam follower 22. Thereby, the gearing portion 4 engages with the drive gear 1 and the nick gear 4 is forcibly rotated clockwise by the drive gear 1.
Forcible rotation of nick gear 3 by this drive gear 1 causes the cam plate 15 to rotate together with the nick gear 3, and the operation link 21 of which cam follower 22 provided at the end thereof is pressurizingly in contact with the cam surface 16 is swayingly rotated in accordance with the shape of this cam surface 16 and thereby a dis-placement for operation can be extracted through the operation arm 25.
When the drive gear 1 is positioned opposingly to the second waiting domain 6-2 after the nick gear 3 makes a half turn, the engaging piece 18 engages with the second engaging step portion 11-2, forcibly suspending rotation of the nick gear and maintaning the operating condition shown in ~ig. 3.
At this time, the cam follower 22 is pressurizingly in contact with the cam surface 16 at the position a little exceeding the position B, effectuating a divided vector force causing the nick gear 3 to rotate clockwise on the cam plate 15.
.
121336~7 When engagement with the second engaging step portin 11-2 of the engaging piece 18 is released by operating the swaying motion driver 19 from the operating condition shown in Fig. 3, the nick gear 3 rotates clockwise due to the effect of cam plate 15 and cam follower 22 and returns to the non operating condition shown in Fig. 2.
A stop tooth 7 provided at the boundary of the tooth-less portion 5 and the first waiting domain 6-1 is provided for absorbing a rotating inertia of the nick gear 3 which ratatingly displaces under the idle condition from said ope-rating condition to the non-operating condition.
Because of rotation of said nick gear 3, the operation link 21 also returns making zero the displacement for ope-ration and thereby a taperecorder changes the operation mode from operation mode to non-operation mode.
As is obvious from description of operations, the swaying motion driver 19 is required only to swayingly dis-place the lock bar 17 for extremely short period of time and therefore it consumes only a lit~le amount of power. As shown in Fig. 2, accordingly, the changeover switch 27 which changes the switching condition in accordance with the sway-ing displacement of the operation link 21 is provided and as shown in Fig. 8 and Fig. 11, any one of the swaying motion driver 19 and a capacitor C as the power source of such swaying motion driver 19 is connected to the power supply by means of said changeover switch 27, while the other is iso-lated from the power supply.
Namely, in the case of an embodiment shown in Fig. 8, the contact piece of changeover switch 27 is in contact with the one contact 27a in the non-operating condition shown in Fig. 1, connecting the swaying motion driver 19 to the power supply terminal V.
When the power switch of a taperecorder is turned ON, a positive voltage is applied to the terminal V but since the transistor Vrl is not turned ON, a power is not supplied to the swaying motion driver 19.
When a signal (this signal is positive) is applied to the terminal PLY, a base current flows into the base of the transistor Trl through a resistor rl. Therefore, the tran-sistor Trl turns ON and thereby a power source is supplied to the swaying motion driver 19. Now, the swaying motion driver 19 starts operation.
When the swaying motion driver 19 operates, the nick gear 3 rotates, causing the operation link 21 in accordance therewith, resulting in the specified displacement.
When the operation link 21 sways, the changeover switch 27 changes the contact piece from the contact 27a to 27b, separating the swaying motion driver lg from the power supply and connecting a capacitor C to the power supply in order to charge it with the porality shown in Fig. 8.
1~1336~ -Namely, as shown in Fig. 9, when a PLY input Vp shown in Fig. 9(a) is applied to the terminal PLY at the time t when the power switch is turned ON, an input Vs shown in Fig. 9(c) is input to the swaying motion driver 19 at the time tl.
However, when the swaying motion driver 19 operates, the nick gear 3 ortates and thereby the changeover switch 27 operates as specified ata the time t2 due to the swaying operation of the operation link 21 at the timing shown in Fig. 9(b). Accordingly, input to the swaying motion driver 19 stops at the time t2.
As described above, when the nick gear 3 rotates, the drive system changes the condition to that shown in Fig. 3 from that of Fig. 2 and the specified operating condition is maintained.
In this condition, since the changeover switch 27 places the contact piece to the side of contact 27b and the input of control circuit IC is set to a high level because an PLY input is applied, a positive voltage is not applied to the base of transistor Tr2, and therefore the transistor Tr2 is in the OFF state. Accordingly, thje swaying motion driver 19 is held in the no-input condition.
When the PLY input is suspended in such an perating condition, an input of the control circuit IC becomes low level. A signal is applied to the base of transistor Tr2 lZ133~7 through the resistor r2, and the transistor Tr2 turns ON.
At this time, since the contact piece of changeover switch 27 is located in the side of contact 27c, a closed loop is formed through the capacitor C, swaying motion driver 19 and transistor Tr2. Thus, the swaying motion driver 19 operates, the engaging piece 18 of lock bar 17 momentarily releases from the engaging step portion 11-2, the nick gear 3 rotates, owing to the effect of cam plate 15 and cam follower 22 and the condition returns to the non-operating state shown in Fig. 2.
On the occasion of above operation, since the operation link 21 also sways, the changeover switch 27 places the contact piece to the contact 27a and waists for the next operation. But, since the PLY input is suspended, no input , ..
is given to the base of transistor Trl and the circuit remains in the open condition at the beginning.
Here,if power failure occurs or the power supply plug is disconnected during the PLY operation, the power supply becomes OFF. Accordingly, a voltage of power supply termi-nal V drops preceding the voltage of capacitor C and simultaneously a voltage of PLY terminal drops. Therefore a voltage of capacitor C input as a high level signal to the base of transistor Tr2 due to the effect of control circuit IC. Thereby, the swaying motion driver 19 operates, causing the nick gear 3 to make half-turn from the condition shown 121336'~
in Fig. 3 to the condition shown in Fig. 2. Of course, the drive gear 1 is not required to drive during this half-turn.
The embodiment shown in Fig. 2 and Fig. 3 is intended to attain all changeover operations of a taperecorder through combination of the one nick gear 7 and drive gear 1.
As a transmitting mechanism for changeover operation energy to be combined to the embodiment shown in Fig. 2 and Fig. 3, the structu-re shown in Fig. 10 is available.
In Fig.10, the operation bar 28 described previously is pivotted at the end of operation arm 25 of the operation link 21 and the operation spring 26 is provided at the end of operation bar 28.
Provided at the side of operation bar 28 with the spe-cified interval are a projected engaging piece 29 for play, projected engaging piece 30 for rewind and a projected engaging piece 31 for fast supply of tape, to which the corresponding operation links 32, 33, 34 are opposingly provided.
In the embodiment of Fig. 10, the operation link 32 for play and operation link 33 for rewind move toward the operation bar 28 when they are excited by the motion driver 35, 36, fort example, like an electromagnetic solenoid provides in the vicinity of them and displace until they engage with the engaging pieces 29, 30, respectively. The engaging piece 31 for fast supply of tape is fixed at both ~213367 sides with the ceramic bimetal 37 and displaces when the specified voltage is applied so that it engages with the engaging piece 31. The operation links 32, 33, 34 are moreover coupled with the operation spring 38 for play, operation spring 39 for rewind and operation spring 40 for fast supply of tape. Therefore, then the operation links 32, 33, 3~ operate respectively for the specified displace-ment, the specified mechanisms operate respectively.
Accordingly the operation mode such as PLAY mode starts and is continued.
Fig. 11 is an embodiment of the circuit structure for obtaining said operations. The switches 41, 42 43 respect-ively operate the driving bodies 35, 36 or the ceramic bimetal 37 and also operate the swaying motion driver 19.
For examaple, when the power switch of a taperecorder is turned ON and the switch 41 is turned ON from the waiting condition of Fig. 1, since the changeover switch 27 is con-nected to the one contact 27a, a power source i5 supplied to the swaying motion driver 19. When it operates, the motion driver 35 for play also operates causing the operation link 32 for play to displace toward the operation bar 28 as described above. Thereby, it becomes ready for engaging with the engaging piece 29 for play.
On the other hand, as in the case of above embodiment, the nick gear 3 makes half-turn by the operation of the 1~13367 swyaing motion driver 19. Therefore,the operation link 21 sways, changing over the switch 27 to the contact 27b, simultaneously pulling the operation bar 28 to the left side in Fig. 10 through the operation arm 35, thus causing the operation link 32 which is already engaged with the engaging piece 29 for play to rotatingly displace. Accordingly the play mechanism for play starts the specified operation and continues it through the operation spring 38 for play.
When the changeover switch 27 is switched to the contact 27b, the base current of transistor Tr2 is by-passed to the earth and enters the turn OFF state, suspending supply of power to the swaying motion driver 19 and drive body 35 for play, and only the capacitor C in the circuit of Fig. 11 is charged.
When the specified operation terminates and the switch 41 is turned OFF, since the changeover switch 27 is swi~ched to the contact 27b, a charging current of capacitor C is partly supplied to the base of transistor Tr2 passing the resistors R2, R3, setting it to the trigger condition.
Therefore, a closed loop is formed through the positive side of capacitor C, collector of transistor Tr2, emitter of the same, swaying motion driver 19 and the negative side of capacitor C. Now, the charges of capacitor C is released to the swaying motion driver 19 and thereby it starts operat-ion. Thus, the nick gear 3 returns to the state of Fig. 1 ~213367 and simultaneously the operation bar 2~ and operation spring 38 for play also return to the state of Fig. 10.
Fig. 12 shows an example of the battery type circuit.
As a power supply, a battery 44 is used. The swaying driv-ing body 19 is connected with a position sensor 45 as a detecting means and the controller 46 comprising a start switch 46a and stop switch 46b.
When operation has completed, the switch of position sensor 45 is in the waiting condition while it is in contact with the contact 45a. When the start switch 46a of control-ler turns ON, the swaying motion driver 19 operates, but the switch of position sensor 45 is in the waiting condition while it is in contact with the contact 45b. When the the stop switch 46b of controller 46 turns ON (simultaneously the start switch 46a is turned OFF) afther the specified operation terminates, the swaying motion driver lg operates again and the switch of position sensor 45 is switched to the contact 45a.
Therefore, when the specified operatioin is activated by the swaying motion driver 19, any electrical power is not supplied during operation. Here, in above description, the drive gear 1 is provided with one nick gear 3 and all changeover operations are attained by the rotating operation of such one nick gear 3. But, as shown in Fig. 4, it is also possible to assemble a pair of nick gears 3,3 to one lZ13367 drive gear 1 and thereby to more simply and directly extract a changeover power from these nick gears 3,3.
In other words, in the embodiment shown in Fig. 4, the structure of nick gear 3 and the combined structure of the drive gear 1, nick gear 3, swaying motion driver 19, lock bar 17 and operation link 21 are the same as those of embodiments shown in Fig. 2 and Fig. 3, and the operations of the structure is also the same as that of embodiments shown in Fig. 2 and Fig. 3. Therefore, detail description of them is omitted here. But in the embodiment of Fig. 4, the lower nick gear 3A is provided as the driving means for recording, reproducing and fast supply of tape, while the upper nick gear 3B for rewind mode.
The end part of both lock bars 17 is extended and a coupling rod 80 is assembled for bridging over the end parts of both lock bars 17.
This coupling rod 80 prevents, when the one nick gear 3 is executing the changeover operation, the other nick gear 3 to start the changeover operation. When the one lock bar 17 is swayingly rotated by the swaying motion driver 19, releass~ engagement of its engaging piece 18 with the engaging step portion 11-1 or 11-2, the coupling rod 80, of which one end is coupled to the end of the lock bar 17, engages the other end with the end part of the other lock bar 17. Thereby, it holds the other lock bar 17 disabling to swayingly displace in such a direction as releasing engagment of the engaging piece 18 thereof with the engaging step portions 11-1, 11-2.
In order to make it more reliable through this coupling rod 80 to prevent almost simultaneous changeover operations by both nick gears 3, it is preferable, as shown in Fig. 4, to form the portion in the range from 10 to 1~ in terms of the cneter angle from the engaging step portions 11-1, 11-2 among the internal surface of groove 9 of the nick gear 3 in the same curvature of radius as that of the projected end of the engaging step portions 11-1, 11-2, so that the lock bar 17 can no longer swayingly return within this range.
In Fig. 4, the one end of operation link 21 assembled to the nick gear 3A serving as the changeover means for recording, reproduction and fast supply of tape is connected with the one end of operation spring 26 and the other end of this operation spring 26 is connected with the head mounting board 66.
Since a spring force of the operation spring 26 is set more forcibly than a spring force of the tensile spring 70 (refere to Figa 1), when the operation link 21 assembled to the nick gear 3A is swayingly displaced clockwise in Fig. 4 due to the rotation of such nick gear 3A, a tensile force is transferred to the head mounting board 66 through the ope-ration spring 26 and the head mounting board 66 slidingly ~Z133~7 moves upward in Fig. 1 owing to such tensile force, opposing to a spring force of the tensile spring 70, causing the pinch roller 67 to be pressed toward the capstan 61 and thereby changing the operation mode to the recording or re-production or fast supply of tape.
On the other hand, when the nick gear 3B for rewind rotates, the operation link 21 assembled to the nick gear 3B
for rewind sways clockwise in Fig. 4 around the fulcrum 23.
Thereby, a tension plate 81 working as the operation spring 26 assembled to the one end of this operation link 21 effectuates a pressing force on the arm end 55a of the lever 55, against a spring force of the tensile spring 82 omitted in Fig. 1. Thereby pressurized contact of this lever 55 to the circumference surface of reel support 54 of the first idler 57 provided to said lever 55 is released and simul-taneously the second idler 58 is caused to be pressurizing-ly in contact with the circumference surface of the reel support 53, rotatingly driving the reel-support 53 in the rewind direction.
At this time, a rotating force is transmitted to the reel 53 by the following procedures. Namely, when the second idler 58 is pressurized to the circumference surface of the reel support 53, the second idler 58 which is allowing the rotating shaft thereof to freely engage with a play with an elongated hole of the lever 55 moves to the first idler 57 causing the circumference surface thereof to be pressuringly in contact with the circumference surface of the first idler 57, thereby a rotating force of the first idler 57 rotatingly driven by the drive motor 63 is trans-mitted to the reel support 53.
In the embodiment shown in Fig.4, the drive system of this invention detects the changeover operating condition.
Namely,a detecting means which detects that the nick gear 3 is rotatingly displaced is omitted but as described above it is enough for the detecting means to detect that the nick gear has started the rotating operatino, namely, the change-over operation is carried out. Therefore, its structure and mounting place are not restricted. It may be structured, as in the case of the embodiments shown in Fig. 2 and Fig. 3, as a changeover switch 27 which is provided opposing to the operation link 21 to be swayingly displaced in accordance with rotation of nick gear 3, or as detecting that the head 69 (refere to Fig. 1) is pressurizingly in contact with the recording tape, or as directly detecting by the cam plate 15 that the nick gear 3 is certainly displaced rotatingly.
In any case, changeover operation of the drive system of this invention is carried out by the operation of the swaying motion driver 19 in this detecting means.
Therefore, it must be confirmed by any means that the nick gear 3 has certainly rotated after the operation instruction i2~3367 is issued to the swaying motion driver 19. When it is confirmed, accurate and reliable operation of the operational and functional part of a taperecorder can be obtained.
As described above, a drive system of this invention has eliminated an electro-maganetic plunger as a drive source of the changeover operation of the operational and functional part and saved thereby a large amount of power consumption. Moreover, such changeover operation is realized with low noise without generating an impact sound.
Particularly any electrical power is not consumed for reset to the waiting state from each operating mode.
Owing to this advantage, if electrical power supply is suspended irregularly due to power failure etc., the drive system of this invention is capable of automatically reset-ting the operational and functional part automatically to the waiting state.
Moreover, since start of changeover operation can be attained automatically by releasing engagement of the engaging piece 1~ with the engaging step portions 11-1, 11-2 through a slight swaying displacement by the swaying motion driver 19 of lock bar 17, this changeover operation start can be detected more reliably. Thereby, more reliable and smooth changeover operation can be obtained.
What is more, since each changeover operation uses a lzl~3l67 rotating force obtained from the drive motor 63 as a driving source, any impact noise is not generated different from the conventional means during the changeover operation and all changeover operations can be attained with electrical instructions. Thereby, diversified disadvantages resulting from mechanical impact can perfectly be eliminated.
Further, the mechanical components for changeover ope-rations can all be provided concentrately to this drive system section. Therefore, the mechanical structure of the changeover function part in a taperecorder can be fantasti-cally simplified.
Claims
WHAT IS CLAIMED IS:
(1) A drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a nick gear, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle;
the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequen-tially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
(2) A drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a first and a second nick gears arranged opposingly to each of said drive gears, each of such nick gear has the structure, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, and a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequen-tially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
(3) The drive system of a taperecorder according to claim 1 and claim 2 wherein said nick gear is structured in such a manner that returning projected portions which forcibly shift the engaging piece formed on said lock bar to the area where it can engage with first or second engaging step portion are provided at the external surface of groove in the upper stream side just before the internal surface of circumferencial groove providing said first and second engaging step portions.
(4) The drive system of a taperecorder according to claim 1 and claim 2 wherein said detecting means is composed of a changeover switch which performs the switching operation in accordance with a swaying displacement of the operation link.
(5) The drive system of a taperecorder according to claim 1 and claim 2 wherein a nick gear is formed by providing a stop tooth at the boundary between the toothless portion and the first waiting domain.
(6) The drive system of a taperecorder according to claim 1 and claim 2 wherein an electrical circuit for controlling a swaying motion driver is structured by connecting a charging capacitor for driving said swaying motion driver in parallel therewith inserted between the plus and minus terminals of the power supply of a taperecorder.
(1) A drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a nick gear, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle;
the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequen-tially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
(2) A drive system of a taperecorder wherein a drive gear rotatably driven by the drive motor, a first and a second nick gears arranged opposingly to each of said drive gears, each of such nick gear has the structure, wherein the first and second toothless waiting domains are formed at the circumference with a mutual positional relationship of a constant center angle; the one among the circumference divided into two parts by these waiting domains is considered as the toothless portion while the other as the gearing portion which engages with said drive gear; the first and second engaging step portions are provided at the edge with the mutual positional relationship in the constant center angle, and a cam plate which is fixed to the rotating shaft of such nick gear and provides the cam surface which sequen-tially and continuously reduces the distance to said rotating shaft as the cam surface position furthest from this rotating shaft comes closer to the nearest cam surface position, a lock bar which is swayingly displaced properly by the swaying motion driver while its end part is engaged with said engaging step portions at the position where said waiting domains are opposing to said drive gear, an operation link which is swayingly fixed while the cam follower provided at the end part is pressurizingly in contact with said cam surface, and a detecting means which performs changeover operation for supply of electrical power to said swaying motion driver by the displacement of a part displacing in accordance with rotation of said nick gear are comprised, and said cam follower is pressurizingly in contact with said cam surface at the position a little in this side of the nearest position or a little other side of the furthest position to/from said cam shaft when said waiting domains are opposed to said drive gear.
(3) The drive system of a taperecorder according to claim 1 and claim 2 wherein said nick gear is structured in such a manner that returning projected portions which forcibly shift the engaging piece formed on said lock bar to the area where it can engage with first or second engaging step portion are provided at the external surface of groove in the upper stream side just before the internal surface of circumferencial groove providing said first and second engaging step portions.
(4) The drive system of a taperecorder according to claim 1 and claim 2 wherein said detecting means is composed of a changeover switch which performs the switching operation in accordance with a swaying displacement of the operation link.
(5) The drive system of a taperecorder according to claim 1 and claim 2 wherein a nick gear is formed by providing a stop tooth at the boundary between the toothless portion and the first waiting domain.
(6) The drive system of a taperecorder according to claim 1 and claim 2 wherein an electrical circuit for controlling a swaying motion driver is structured by connecting a charging capacitor for driving said swaying motion driver in parallel therewith inserted between the plus and minus terminals of the power supply of a taperecorder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57-109545 | 1982-06-25 | ||
| JP57109545A JPS592248A (en) | 1982-06-25 | 1982-06-25 | Driving device of tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1213367A true CA1213367A (en) | 1986-10-28 |
Family
ID=14512959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000431243A Expired CA1213367A (en) | 1982-06-25 | 1983-06-27 | Drive system of taperecorder |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS592248A (en) |
| CA (1) | CA1213367A (en) |
| GB (1) | GB2126405B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8402145A (en) * | 1984-07-06 | 1986-02-03 | Philips Nv | MAGNETIC BAND TAPE DEVICE WITH A SERVING DEVICE. |
| NL8402637A (en) * | 1984-08-30 | 1986-03-17 | Philips Nv | MAGNETIC BAND TAPE DEVICE WITH A SERVO DEVICE. |
| JPS61239452A (en) * | 1985-04-15 | 1986-10-24 | Clarion Co Ltd | Cam gear device for tape player |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51116724U (en) * | 1975-03-18 | 1976-09-21 | ||
| JPS53140007A (en) * | 1977-05-13 | 1978-12-06 | Hitachi Ltd | Power transmission system for cassette tape recorder |
| JPS6021418B2 (en) * | 1977-11-19 | 1985-05-27 | ソニー株式会社 | Recording/playback device |
| JPS6019057B2 (en) * | 1978-01-19 | 1985-05-14 | ソニー株式会社 | Operating device for recording/playback equipment, etc. |
| JPS6021419B2 (en) * | 1979-03-30 | 1985-05-27 | 日本ビクター株式会社 | Operation selection device for cassette tape recorder |
| JPS604285Y2 (en) * | 1979-04-04 | 1985-02-06 | 東京録音工業株式会社 | Tape recorder operation drive device |
| GB2072918B (en) * | 1980-03-24 | 1984-02-01 | Tokyo Rokuon Kogyo Kk | Tape recorder drive |
-
1982
- 1982-06-25 JP JP57109545A patent/JPS592248A/en active Granted
-
1983
- 1983-06-27 CA CA000431243A patent/CA1213367A/en not_active Expired
- 1983-06-27 GB GB08317410A patent/GB2126405B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2126405A (en) | 1984-03-21 |
| GB8317410D0 (en) | 1983-07-27 |
| JPH0130230B2 (en) | 1989-06-16 |
| GB2126405B (en) | 1986-02-12 |
| JPS592248A (en) | 1984-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |