JPS6346909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette adapter used, for example, when installing a tape cassette smaller than a standard type into a standard type recording/reproducing machine. By providing a speed switching mechanism that reduces the moving speed of the tape guide means for feeding out the tape at a position before a predetermined stop position, for example, when forming a predetermined tape path, the tape path will not become slack. The object of the present invention is to provide an adapter for a tape cassette that does not cause any risk of damage to the tape or tape guide means when the tape guide means stops when it hits a stopper. In order to use a small tape cassette used in a recording/reproducing machine that is equipped with a larger tape cassette, such as a standard type tape cassette, it is necessary to convert the small tape cassette into a standard type tape cassette. An adapter is required. 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 The distance between the take-up reel and the tape cassette is smaller than that of the standard type, and in order to record and play back on a standard type recording/playback machine, a small tape cassette configured in this way can be connected to the small tape cassette using an adapter. 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 below, 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,
This is accomplished 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, when the small cassette A is attached to the adapter for use in a recording/reproducing machine exclusively for this small cassette or a standard type recording/reproducing machine, the lower half 2 has a notch so that the driving force transmission medium can mesh with the teeth 16. A portion 17 is formed.

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 the motors 40 and 41 are configured to be driven simultaneously with the start of driving of this 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 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. When the bar 49 is moved downward in FIG. 3, the rotating body 55 connected to the other end of the bar 49 rotates counterclockwise.
The tape feeding lever 42, which is integrally constructed with the rotating body 55, is rotated to a stop position by a stopper 58. 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.

As details of the tape feeding lever 42 are shown in FIG.
51 is provided, and these protrusions 50, 51
Switches 52 and 53 are provided at predetermined positions relative to each other, and when the tape feed lever 42 rotates, the protrusions 50 and 51 come into contact with the switches 52 and 53 to turn on the switch.

That is, when the tape feeding lever 42 starts operating by pressing the loading start button 38 and rotates from the point A to the point B in FIG. 5, the protrusion 50 contacts the switch 52.
This device is configured so that no change occurs, and when the tape feed lever 42 further rotates and reaches the C point position, the protrusion 51 contacts the switch 53, and this contact causes the motor to move. 40
The speed control circuit of the motor 40 is activated, the drive speed of the motor 40 is reduced, and the tape feeding lever 4 slowly moves.
2 in the same direction, and the stopper 58
Stop when it hits.

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 is stopped.

The motor 41, which is a drive source for rotating the tape feed lever 43, operates simultaneously with the motor 40, and this motor 41 is attached to a mounting plate 62, which is attached to the motor shaft of the motor 41. A rotational force is transmitted from the worm 63 to the gear 64, and the tape feeding lever 43 is rotated. Note that this gear 64 is rotatably supported by a mounting plate 65. A pin 66 is implanted in the gear 64, and one end of a bar 67 is connected to this pin 66, and the other end of the bar 67 is connected to the tape feeding lever 4.
They are rotatably attached to pins 68 implanted in the base portion of No. 3, respectively. The driving force from the gear 64 is transmitted to the tape feeding lever via the bar 67. In addition, this tape feeding lever 4
3 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.

As the details of the tape feeding lever 43 are shown in FIG. ni switch 7
1 and 72 are provided, and the tape feeding lever 4
When the switch 3 rotates, the protrusions 69 and 70 come into contact with the switches 71 and 72, and the switches are turned on.

That is, when the tape feeding lever 43 starts operating by pressing the loading start button 38 and rotates from the point A to the point B in FIG. 6, the protrusion 69 contacts the switch 71.
This device is configured so that no change occurs, and when the tape feeding lever 43 further rotates and reaches the C point position, it comes into contact with the switch 72 of the protrusion 70, and this contact causes the motor to start. 41
The speed control circuit of the motor 41 is activated, the drive speed of the motor 41 is decelerated, and the tape feeding lever 4 slowly moves.
3 in the same direction, and the stopper 74
Stop when it hits.

When the tape feed lever 43 is in the state shown in FIGS.
The pin 75 provided on the lower side 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.

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

The rotational force of this 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. The reel 8 is configured to transmit a force that is somewhat smaller than the force that causes the supply reel 8 to spin idly against the applied brake. 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.

When the adapter is configured as described above, the loading operation first involves loading the lid 3 of adapter B.
3, open the front lid 3 of small cassette A and insert it into the storage compartment A', close the lid 33, and press the loading start button 38. The motors 39, 40, and 41 will operate, respectively. The tape feeding levers 42 and 43 begin to rotate via the driving force transmission medium, and the tape in the small cassette begins to be fed out. Then, tape feed lever 4
2 and 43 rotate at a predetermined speed, and stopper 5
When the protrusions 51, 70 contact the switches 53, 72, the speed control circuit of the motors 40, 41 is activated to reduce the driving speed of the motors 40, 41. ,
It is assumed that the rotational movement speed of the tape feeding levers 42 and 43 is slow. The tape feeding levers 42, 43, which move at a slower speed, come into contact with the respective stoppers 58, 74 and stop. Also, after the tape feeding levers 42, 43 stop, the motors 40, 4
1, the pins 59 and 75 come into contact with the switches 61 and 77, and the switch stops at this point. Further, 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 9 is rotated by the force of the spring 102.
2 moves away from the rotating body 95, hits the stopper and stops.

At the end of the above operation, the small cassette A
The tape is fed out to form a tape path that is almost the same as that of a standard type tape cassette, and recording and playback can be performed by attaching this small cassette attachment adapter to a recording/playback device. Become.

In particular, during the tape path forming operation, the moving speed of the tape feeding lever is reduced from the position before the stopper by the stopper, so the impact force upon collision with the stopper is weak, and the stopper, tape feeding lever, The guide rollers are less likely to be damaged, and since the rotation speed of the tape feed lever is slowed down, there is no risk of the tape being fed out excessively and forming a loose tape path, making it easier to form tape paths. This is more accurate, and the tape path can be formed more quickly than when the tape feed lever is rotated slowly from the beginning.

After recording and reproducing, when the small cassette mounting adapter is taken out from the recording and reproducing machine and the unloading button 118 is pressed, the motor 41 rotates in the opposite direction to the above case, and the tape feeding lever 43 moves to the fourth position.
The state shown in the figure returns to the state shown in FIG. 3, and the pin 75 of the motor 41 comes into contact with the switch 76 and stops. Immediately thereafter, the motor 40 rotates in the opposite direction to the above case, and the tape feeding lever 42 is moved to the fourth position. The state shown in the figure returns to the state shown in FIG.
During these operations, the motor 39 again rotates in the same direction to transmit the tape winding drive force to the winding reel 9, and the motors 40, 41
Simultaneously with the stop of the motor 39, the small cassette A is in the same state as when it was attached to the adapter.

It should be noted that during this tape winding and storing operation, as well as during the tape path forming operation, the rotational movement speed is configured to be decelerated at a position before the stop position of the tape feeding lever. That is, the fifth
6, when the tape feeding lever returns from the point D position to the point A position, the protrusions 50, 69 come into contact with the switches 52, 71 at the point B position,
This contact activates the speed control circuits of the motors 40, 41, and the driving speed of the motors 40, 41 is reduced. In addition, during this operation, that is, at the point C position, the protrusion 5
Even if the switches 53, 72 come into contact with the switches 53, 72, the speed control circuit will not operate.

Then, open the lid 33 of the adapter B and take out the small cassette A from the storage section A'.

FIG. 7 shows the rotation speed switching of the tape feeding lever of the tape cassette adapter according to the present invention.
FIG. 4 is an explanatory diagram of main parts in a case where the control is performed not by electrical control but by a mechanical configuration.

For example, by considering the mounting position of the gear 64 and the bar 67, that is, when the guide roller 45 of the tape feeding lever 43 is in the position before tape feeding, the position of the pin 66 is determined at point A in FIG. position, and when the gear 64 rotates clockwise and the tape feed lever is at point B in FIG. 6, the pin 66 corresponds to point B in FIG.
Then, when the gear 64 rotates further and the tape feeding lever is at the position of point C in FIG. 6, the pin 66 corresponds to the position of point C in FIG. If the pin 66 is configured to correspond to the position D in FIG. 7 when the lever is at the position D in FIG. 6, the gear 64
Even if the rotational speed of bar 67, that is, pin 6 is constant,
In Fig. 7 of 6, the speed in the left and right direction is not constant, and AB
It moves slowly at the position between BC, quickly at the position between BC, and slowly at the position between CD. Therefore, depending on the speed change of the bar 67, the rotating speed of the tape feeding lever changes to the tape feeding speed. The lever becomes smaller from before the stop position by the stopper, and the same effect as in the previous embodiment is achieved.

In addition, the speed switching means using the above mechanical configuration is as follows:
A similar configuration can be made on the tape feeding lever 42 side.

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 attached to a standard type recording or reproducing machine. A tape guide means for feeding out a tape from a small tape cassette to form a predetermined tape path, and a tape guide means for feeding a tape from a tape feeding position to a predetermined tape feeding completion position by the tape guide means, or at a position before tape feeding is completed, or at a position before tape feeding is completed. Since the tape guide means is provided with a means for switching the moving speed of the tape guide means before the tape payout position on the path leading from the completion position to the tape payout position, the tape guide means can be stopped slowly, and when the tape guide means is stopped, The tape guide means, tape, etc. are less likely to be damaged, and the tape is less likely to loosen when forming the tape path, so that the tape path formation is accurate and the tape path formation operation is performed quickly. It has the following features.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a small cassette, Figures 2 to 4
The figure is a schematic explanatory diagram of the tape cassette adapter according to the present invention, FIGS. 5, 6, and 7 are explanatory diagrams of the main parts, and FIGS. 8 and 9 are partial explanatory diagrams. A...Small cassette, B...Adapter, 42,
43... Tape feeding lever, 44, 45... Guide roller.

Claims (1)

[Claims] 1 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 playback machine, which feeds out the tape from the small tape cassette attached to the adapter and passes it along a specified tape path. and a tape feeding position of a path from the tape feeding position of the tape guide means to a predetermined tape feeding completion position, or at a tape feeding position of a path leading from the tape feeding completion position to the tape feeding position. An adapter for a tape cassette, comprising means for switching the moving speed of the tape guide means at the front.