JPS6334147Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tape cassette adapter used when, for example, a tape cassette smaller than a standard type is attached to a standard type recording/reproducing machine. A tape cassette is provided with a means for detecting the tape winding amount and displaying the tape winding amount based on the detected tape winding amount, so that the tape winding amount can be accurately known regardless of the recording/reproducing machine used. The purpose is to provide an adapter for

If you want to use a small tape cassette used in a recording/playback machine such as a video tape recorder in a recording/playback machine that is larger than this small tape cassette, for example, a standard type tape cassette, you must use a small tape cassette. You will need an adapter to convert it to a standard tape cassette. If the tape path of a small tape cassette is configured the same as that of a standard tape cassette, this adapter may simply serve as a housing. Even though it is small, it is not that small because the tape path is the same as that of a standard type tape cassette. Therefore, in order to make a small tape cassette substantially smaller, for example, the supply reel in the small tape cassette must be In order to make the distance from the take-up reel smaller than that of a standard type tape cassette, and to record and play back a small tape cassette configured in this way with a standard type recording/playback machine, an adapter can be used to connect the small tape cassette to the standard type. The tape path must be changeable to accommodate standard types of recording/playback equipment.

This application has been made in accordance with the above objectives,
Examples thereof will be described below.

FIG. 1 is a perspective view of a tape cassette, which is smaller than a standard type tape cassette used in, for example, a standard type recording/reproducing machine, with its front lid open.

In the figure, A is a small cassette, and the frame of this small cassette A consists of an upper half 1, a lower half 2, and a front cover 3 for protecting the tape. It is rotatably attached to the upper part by a support shaft 4. One end of the sliding piece 7, which is held so as to be able to slide in the groove by being pressed by a substantially U-shaped spring 6 inserted into a groove 5 bored in the side surface of the upper half 1, is attached to the front cover 3. When the front cover 3 is in the closed state, the front cover 3 is maintained in that state, and when the front cover 3 is opened, the open state is maintained.

A supply reel 8 and a take-up reel 9 are arranged in the small cassette A, and the distance between the supply reel 8 and the take-up reel 9 is such that the distance between the supply reel 8 and the take-up reel 9 is a standard type that cannot be installed only in the small cassette A. The distance is shorter than the distance between the supply reel disk and the take-up reel disk of the recording/reproducing machine.
Further, the magnetic tape 10 is arranged such that it runs along a predetermined running path between the supply reel 8 and the take-up reel 9. That is, the magnetic tape 10 is moved from the supply reel 8 to the guide pole 1.
1 and 12, and is then wound onto the take-up reel 9. An uneven groove is formed on the lower surface of the lower flange of the supply reel 8, and an uneven groove is also formed at a predetermined position of the lower half 2 corresponding to the uneven groove of the lower flange. The supply reel 8 is biased toward the lower half 2 by the action of the attached leaf spring, and the uneven grooves engage with each other.
The supply reel 8 is fixed to prevent the magnetic tape wound on the supply reel 8 from loosening. still,
When the small cassette A is installed in the recording/reproducing machine, the supply reel 8 is lifted by the supply reel disk of the recording/reproducing machine over a specified amount toward the half 1 side against the repulsive force of the leaf spring, and the uneven grooves are aligned with each other. The mesh is released and it becomes possible to rotate. That is, a hole 13 for inserting the supply reel disk of the recording/reproducing machine is formed in the lower half 2 at a position corresponding to the supply reel 8, so that the supply reel disk can be inserted into the supply reel 8. become. The take-up reel 9 is inserted into a shaft 14 fixed to the lower half 2 and is rotatable about the shaft 14.

A brake mechanism is disposed on the take-up reel 9 so that the take-up reel 9 does not rotate when the small cassette A is not installed in the recording/reproducing machine. This brake mechanism consists of a brake that presses the upper surface of the peripheral edge of the lower flange 15 of the take-up reel 9. This brake is inserted into a shaft formed integrally with the lower half 2, and is operated by a spring. When the brake is pressed and energized, the shoe portion of the brake comes into pressure contact with the surface of the lower flange 15, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen. Furthermore, when the small cassette A is attached to a recording/reproducing machine or an adapter described later, a force is applied that resists the repulsive force of the spring, the shoe part of the brake is separated from the lower flange 15 surface, and the take-up reel 9 can rotate. It becomes like this. The rotation of the take-up reel 9 is different from that of the supply reel 8, and is carried out by a driving force transmission medium that meshes with teeth 16 formed on the peripheral side surface of the lower flange 15 of the take-up reel 9. . Therefore, small cassette A is
A notch 17 is formed in the lower half 2 so that a driving force transmission medium can mesh with the teeth 16 when it is attached to an adapter for use in a recording and reproducing machine exclusively for this small cassette or a standard type recording and reproducing machine.

Fig. 2 is a partial perspective view of a tape cassette adapter for using the small cassette in a standard type recording/reproducing machine, and Figs. 3 and 4 show the tape cassette adapter with the upper half removed. It is an explanatory diagram.

In the figure, reference numeral B denotes an adapter with an external shape that is almost the same as that of a standard type tape cassette.This adapter B consists of a front lid 30, an upper half 31, and a lower half 32, and has a storage section A' that stores a small cassette A. It is configured. Further, a lid 33 is provided at the opening of this storage section A'.

Then, when the lid 33 is opened and the front lid 3 of the small cassette A is opened and the small cassette A is attached to the storage compartment A', the contact piece of the switch 34 provided on the front side wall of the storage compartment A' When the lid 33 is closed after the small cassette A is installed, the lock portion 35 of the lid 33 engages with the adapter B. The contact piece of the switch 37 provided at the bottom of the engaging recess 36 is pressed to be in the switch-on state by being fitted into and engaged with the recess 36. That is, when the small cassette A is set in the storage section A' of the adapter B and the lid 33 is closed, the tape feeding mechanism described later is activated.

38 is a loading start button, and when this loading start button 38 is pressed while the switches 34 and 37 are on, the motor 39 is activated.
is driven, and motors 40 and 41 are driven a little later than the start of driving of motor 39. Then, as the motors 40 and 41 are driven, the tape feeding levers 42 and 43 are rotated from the solid line position in FIG. 3 to the solid line position in FIG. The tape is fed out by guide rollers 44, 45 provided at the tips of levers 42, 43, and a predetermined tape path, that is, a tape path substantially similar to the tape path of a standard type tape cassette is formed. . The reason why the motor 39 is activated a little earlier than the motors 40 and 41 is to take into consideration the case where there is slack in the tape before tape loading. If the tape is loose due to
Rotate the take-up reel 9 in the tape winding direction,
This is to allow the tape to be wound onto the take-up reel 9.

The motor 40 is placed on a mounting plate 46 having a substantially L-shaped cross section, and the motor shaft of the motor 40 is inserted into a hole in the upright portion of the mounting plate 46 to be attached. Since the worm 47 is attached to the worm 47, the gear 48 meshing with the worm 47 rotates when the motor 40 is driven, and the rotation of the gear 48 in the counterclockwise direction in FIG. The bar 49 connected at one end is moved downward.

FIG. 5 is an explanatory view of the mechanism around the motor 40. The bar 49 is composed of a lower bar 49' and an upper bar 49'', and the lower bar 49' has pins 50, 51. The pins 50 and 51 are loosely fitted into the holes 52 and 53 of the upper bar 49'', and one end of the upper bar 49'' of the bar 49 is rotatably attached to a pin 54 implanted on the gear 48. It is attached to the lower bar 4 of the bar 49.
The other end of 9' is a pin 56 implanted in the rotating body 55.
It is rotatably attached to the pin 5.
Since the coil spring 57 is attached between
9' are pulled together.
Then, when the bar 49 is moved downward in FIG. Become moved. That is, the tape feeding lever 42
is displaced from the state shown in FIG. 3 to FIG. 4 by the drive of the motor 40, and the tape is fed out from the small cassette A.

At this time, one end of the bar 49 supported by the pin 54 reaches the A ₂ point position from the A ₁ point position in FIG.
Further, it reaches the _3rd point A while resisting the tensile force of the coil spring 57. When the A ₃ point position is reached,
Due to the positional relationship of the bar 49, that is, the bar 49 in FIG. Since it is configured, the gear 48
Even if the drive of the motor 40 is stopped due to the tensile force of the coil spring 57, it will not rotate in the opposite direction.

When the tape feed lever 42 is in the state shown in FIGS.
A pin 59 planted downward from the bottom of the switch 60 separates from the switch 61 and presses against the switch 61.
At this point, the motor 40 will stop.

The motor 41, which is the drive source for rotating the tape feed lever 43, operates at the same time as the motor 40, somewhat later than the operation of the motor 39. A rotational force is transmitted from a worm 63 attached to a motor shaft to a gear 64, and the tape feeding lever 43 is rotated. still,
This gear 64 is rotatably supported by a mounting plate 65.

FIG. 6 is an explanatory diagram of the mechanism around the gear 64, in which one end of the bar 67 is connected to the pin 66 implanted in the gear 64, and the other end of the bar 67 is connected to the base of the tape feeding lever 43. They are rotatably attached to implanted pins 68, respectively. This bar 67
Like the bar 49, it consists of a lower bar 67' and an upper bar 67'', and the pins 69 and 70 installed in the lower bar 67' are connected to the holes 71 and 70 bored in the upper bar 67''.
72 and is polymerized with an E-ring.
Further, coil springs 73 are attached to the pins 66 and 69. It should be noted that this coil spring 73 does not exert any spring force when the bar 67 is in the state shown in FIG.

The driving force from the gear 64 is then applied to the bar 67.
The tape feeding lever 43 is rotatably supported by the ceiling part of the upper half 31 and the bottom part of the lower half 32 of the adapter B at the base part. When the pin 66 of the gear 64 moves from point _B1 to point _B2 shown in FIG. The tape is fed out from the small cassette A to form a tape path substantially the same as that of a standard type tape cassette, and at this point the guide roller 45 is positioned by the stopper 74.

Further, the gear 64 is moved from _two points B by the driving force of the motor 41 while resisting the spring force of the coil spring 73.
B Reach ₃ points and stop. That is, the pin 75 provided on the lower side of the gear 64 moves from the contact state with the switch 76 to the contact state with the switch 77, and the driving of the motor 41 is stopped. Note that this motor stopping mechanism is similar to the stopping mechanism of the motor 40.

The gear 64 stops at _three points B,
In this state, that is, in the state shown in FIG. 4, the bar 67 is configured to be located below the imaginary line connecting the pin 68 and the rotation axis center point of the gear 64. The spring force of the coil spring 73 does not cause the gear 64 to rotate in reverse. That is, such a biasing mechanism for the gear 64 is configured similarly to the biasing mechanism for the gear 48.

Further, a lock arm 78 is provided which rotates according to the rotation of the gear 64, and is driven by the rotation of the gear 64 to lock the guide roller 45 forming a predetermined tape path in a predetermined position. Become.

In this lock mechanism, as shown in FIG. 7 in an exploded state, a lock arm 78 has a housing part 79 having a substantially U-shaped cross section, and a lever 81 having a torsion coil spring 80 is housed in this housing part 79. , one end of the torsion coil spring 80 is connected to the groove part 8 of the housing part 79.
2, the other end is locked to the side wall of the lever 81. In this state, the pin 83 is inserted into the hole of the lock arm 78 and the lever 81, and the lock arm 78 and lever 81 are rotatably held on the ceiling of the adapter. Furthermore, this pin 83
is attached to the ceiling by screwing a screw into a hole 85 drilled in the head 84.

The lever 81 is provided with a pin 86, which is loosely engaged with a long hole 88 formed at one end of the connector 87, and a gear is inserted into a hole 89 formed at the other end of the connector 87. 64 pin 66
are installed in a loose manner. Also, lever 8
One end side of a coil spring 90 is attached to 1,
The other end of the coil spring 90 is attached to a pin planted in the ceiling of the adapter, and biases the lever 81 and lock arm 78 counterclockwise in FIG. 3 or 4. Note that the lever 81 biased by this biasing force is positioned by a pin 91.

Then, as shown in FIG. 4, the pin 6 of the gear 64
6 reaches point B ₂ from point B ₁ , the tape feed lever 43 changes from the state shown in FIG. 3 to the state shown in FIG. Inside, the lock arm 78 does not move because the connection between the connector 87 and the lever 81 is through the elongated hole 88 and the pin 86, and it resists the force of the coil spring 90 from the moment the pin 66 passes the point _B2 . At the same time, the lock arm 78 is rotated clockwise, and when the pin 66 reaches a point in front of the final position _B3 , the lock arm 78 holds the guide roller 45 from the outside, and reaches the _B3 point. This rotation causes the connector 87 to move against the torsion coil spring 80 and press the lock arm 78 against the guide roller 45.

Furthermore, when the motor 39 operates in the state shown in FIG. The roller 92 and rotating body 95 rotate clockwise around the
come into contact with each other, and the driving force is transmitted to the rotating body 95.

The rotational force of the rotating body 95 is transmitted to a gear 96 through a friction structure as shown in FIG. hand,
The tape is transmitted to the take-up reel 9 of the small cassette A, and the slack tape is wound onto the take-up reel 9. Furthermore, when the tape is fed out from the small cassette A by the guide rollers 44 and 45 of the tape feeding lever, this driving force in the tape winding direction is applied to the tape as a braking force in the opposite direction to the tape feeding direction. This prevents excess tape from being drawn out even if the tape is pulled out forcefully. Further, this driving force in the tape winding direction is applied to the supply reel 8 of the small cassette A when the tape is stretched to the maximum extent when the tape is wound on the supply reel 8 of the small cassette A. It is configured such that a force that is somewhat smaller than the force that causes the supply reel 8 to spin idly against the applied brake is transmitted. this is,
When feeding out the tape, the take-up reel 9 is always
This force is controlled by the friction structure, and this friction structure consists of a gear 96 shown in FIG. 99, Rotating body 9 which is a gear on this felt
5. It is composed of a spring 101 that presses the rotating body 95 in cooperation with the annular body 100, and resists the braking force of the supply reel 8 even when the tape is fed out to a predetermined position. The friction torque is set to prevent the tape from being wound onto the take-up reel 9.

This motor 39 is connected to motors 40 and 41.
is configured to stop after the stop of
After a predetermined tape path is formed by the guide rollers 44 and 45, the motor 39 is stopped, and the roller 92 is rotated counterclockwise by the force of the spring 102 and separated from the rotating body 95. Therefore, after a tape path that is almost the same as that of a standard type tape cassette is formed, even if this adapter is attached to a standard type recording/playback machine and the recording/playback machine is operated, the recording/playback will not be possible. Even when the reel disk on the take-up side of the machine is fitted into the guide hole 103 of the gear 96 and the driving force of the reel disk on the take-up side is transmitted, the roller 92 and the rotating body 95 are separated, so the brake cannot be used. No force acts.

An annular recess 104 is provided in the ceiling of the adapter B where the gear 96 is disposed and has a guide hole 103 into which the take-up reel disk of the recording/reproducing machine is fitted.
is formed, and the gear 96 is structured to be able to move somewhat within the range of this annular recess 104.
Gears 97 and 98 that transmit driving force to the take-up reel 9
The bearing 1 is attached to the side wall of the non-gear portion of the gear 96.
Annular body 1 is rotatably fitted loosely through 05
06 and is attached to the annular body 1.
It is designed to move along with the movement of 06.

Further, one end side of a sliding plate 107 is rotatably attached to this gear 98, and the sliding plate 10
The other end of 7 is rotatably attached to an adapter at a position corresponding to the rotational axis position of the take-up reel 9 of the small cassette A installed in the adapter storage section. In response to this, the gear 98 meshes with the take-up reel and the gear 9
7 is meshed with gear 96,
The driving force of the reel disk on the take-up side of the recording/reproducing machine is reliably transmitted to the reel 9 on the take-up side.

The gear 96 is connected to the annular portion 1 provided at one end of the base portion 108 to which the motor 39 is attached.
09, and the bearing 105 and the annular body 106 are press-fitted and held in this loose portion. Further, the movement of this gear 96 is mainly caused by the movement in the vertical direction in FIG.
The movement is centered at 0, and the movement in the left and right directions in FIG. Furthermore, this movement is restricted by the peripheral edge of the annular recess 104.

The motor 39 is attached to the base portion 108, and the rotation shaft 94 of the motor 39 hangs down from the base hole 112. A holding member 93 is rotatably attached to this rotating shaft 94, and a shaft of a roller 92 is disposed in a recess 113 of this holding member 93, and the roller 92 is in pressure contact with the rotating shaft 94. As described above, the roller 92 rotates due to the rotational friction force. As shown in FIG. 9, this roller 92 is attached by a pin 114 that passes through the lower part of the roller 92 and is suspended horizontally on the side wall of the recess 113, and this pin 114 is further provided with a spring 115. The bottom of the recess 113 and the roller 92
A spring force is applied to a protrusion 116 formed at the lower part of the roller 92, and with this configuration, the roller 92 is pressed against the rotating shaft 94.
Note that 117 is an opening of the recess 113, which facilitates attachment of the roller 92.

Reference numeral 150 denotes a pulley that is integrally provided on the upper side of the gear 97, and the belt 1 is attached to this pulley 150.
51 is stretched, and the other side of this belt 151 is stretched around a pulley 152. Pulley 15
2 has a worm 153 integrally configured,
This worm 153 has the gear 1 of the counter 154.
55 are in mesh with each other.

156 is a reset button.

If adapter B is configured as above,
In the loading operation, first open the lid 33 of the adapter B, then attach the small cassette A to the storage section A' with the front lid 3 of the small cassette A open, and then close the lid 33. Then, the switches 34 and 37 are turned on, the motor 39 is operated, and the roller 92 that is in pressure contact with the rotating shaft 94 of the motor 39 is moved to the holding member 93.
comes into contact with the rotating body 95 due to the rotation of the gears 96,
The motor 39 is connected to the take-up reel 9 via 97 and 98.
The driving force is transmitted, and the take-up reel 9 rotates in the tape winding direction to wind up the slack tape.

Then, when the loading start button 38 is pressed to turn it on, the motor 40 operates,
The driving force is transmitted to the rotating body 5 via the gear 48 and the bar 49.
5, the tape feeding lever 42 is rotated, and the tape in the small cassette is fed out. Then, the tape feeding lever 42 rotates to a predetermined position and stops when it hits the stopper 58. However, the gear 48 continues to rotate in the same direction even after the tape feed lever 42 stops, and the pin 59 comes into contact with the switch 61, at which point the motor 40 stops.

Simultaneously with the operation of the tape feeding lever 42, the motor 41 is also operated by pressing the loading start button 38, and the driving force is transmitted to the tape feeding lever 43 via the gear 64 and the bar 67. rotates to a predetermined position, hits stopper 74 and stops. However, gear 64
further rotates while stretching the coil spring 73, and connects the lock arm 7 via the connector 87 and lever 81.
8 is rotated, and the lock arm 78 is pressed against the guide roller 45 of the tape feeding lever 43 by the force of the torsion coil spring 80. After this crimping operation, the pin 75 of the gear 64 comes into contact with the switch 77, and at this point the motor 41 stops.

In this state, the tape in the small cassette A is fed out by the guide rollers 44, 45 of the tape feeding levers 42, 43, and the tape path is approximately the same as that of a standard type tape cassette.

When the motors 40 and 41 are stopped, the motor 39 is stopped, and the holding member 93 on which the roller 92 is provided is rotated by the force of the spring 102, and the roller 92 is separated from the rotating body 95 and reaches the stopper. It hits and stops.

At the end of the above operation, the small cassette A
The tape is fed out from the cassette to form a predetermined tape path, and recording and playback can be performed by attaching this small cassette mounting adapter to a recording/playback machine.

Then, after recording and reproducing, take out the small cassette mounting adapter from the recording and reproducing machine and press the unloading button 118, the motors 40, 4
1 rotates in the opposite direction to the above case, and the motor 39 rotates again in the same direction to transmit the tape winding driving force to the winding reel 9, and the pins 59 and 75 contact the switches 60 and 76. Then, the motors 40 and 41 stop, and the motor 39 also stops, resulting in the same state as when the small cassette A was attached to the adapter B. Therefore, the lid 33 of the adapter B can be opened and the small cassette A can be taken out from the storage section A'.

Incidentally, during the loading operation, the coil springs 57, 73 and 41 keep the motors 40, 41 operating for a while even after the tape is fed out by the tape feeding lever and a predetermined tape path is formed. The stoppers 58 and 74 are used to firmly hold the guide roller in a predetermined position, and the motor 39 is also operated so that if there is slack in the tape after the tape path is formed, it can be wound up. This is so that you can keep it. Similarly, during the unloading operation, the reason why the motor 39 is operated even after the guide rollers 44 and 45 are in the position shown in FIG. 3 is to eliminate tape slack and completely wind the tape. This is to allow it to be wound onto the side reel 9.

To display the tape winding amount, when the small cassette A that has been rewound is loaded, first press the reset button 156 to set the display on the counter 154 to [000], for example. When the recording start button 38 is pressed, the tape feeding means is activated to form a tape path substantially similar to the tape path of a standard type tape cassette, so that it can be recorded and reproduced by a standard type recording and reproducing machine.

If the small cassette mounting adapter is attached to the recording/reproducing machine in this state, recording/reproducing operation will be performed. During this recording/reproducing operation, the pulley 150 also rotates along with the rotation of the take-up reel of the small cassette. A pulley 152, a worm 153, and a gear 155 are rotated via a belt 151, and the amount of tape travel is counted and displayed.

It should be noted that the gear 96 of the pulley 150 may move somewhat due to the take-up side reel disk of the recording/reproducing machine, and as a result, the belt 151 between the pulleys 150 and 152 may move slightly. Since it is made of an elastic material, there is no adverse effect on the drive of the gear 155 that changes the count display.

FIG. 10 is an explanatory diagram of the main part when the means for counting and displaying the amount of tape winding is performed by electrical means rather than mechanical means.

That is, a light emitting and receiving element 160 is attached to the lower side of the annular body 106, and a reflecting part (not shown) is provided on the upper side of a gear 96 that rotates below the light emitting and receiving element 160. element 160
The light emitted from the light emitting part hits the reflecting part passing through as the gear 96 rotates, and this reflected light is received by the light receiving part of the light emitting/receiving element 160, and the pulses received by this light receiving part are counted by the counting circuit. The counted pulses are then converted into decimal notation using a decoder or the like, and are displayed on a numeric display light emitting diode (not shown).

As mentioned above, the tape cassette adapter according to the present invention is an adapter used when a tape cassette smaller than a standard type tape cassette is used by attaching it to a standard type recording or reproducing machine. A tape winding means for winding up the tape from a small tape cassette, a tape winding means for winding up the tape, and a tape winding amount detected according to the tape winding operation of the tape winding means. Since a means for displaying the tape amount based on the detection output of the detecting means is provided, an accurate display can be made regardless of the counter display of the recording/playback machine. Although there are considerable variations in the counter display due to differences in the models of playback machines, etc., it is possible to display accurately without such variations, and since such a means is provided in the adapter. Even when using another recording/playback device, the same playback will always be possible if the playback is performed at the designated counter display, eliminating inconveniences caused by variations depending on the type of recording/playback device, etc. It has the following features.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a small cassette, Figures 2 to 1
FIG. 0 is an explanatory diagram of a tape cassette adapter according to the present invention. A...Small cassette, B...Adapter, 15
0,152...Pulley, 151...Belt, 15
4...Counter.

Claims (1)

[Scope of utility model registration request] An adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or playback machine, and is a tape feeder that feeds the tape to a predetermined position from a small tape cassette placed on the adapter. a tape winding means for winding the unwound tape; a means for detecting the tape winding amount according to the tape winding operation of the tape winding means; and a tape winding means for detecting the tape winding amount based on the detection output of the detection means. An adapter for a tape cassette, characterized in that it is provided with means for displaying.