JPH026155B2 - - 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 installed in a standard type recording/reproducing machine, and the present invention relates to a tape cassette adapter that is used when installing a tape cassette smaller than a standard type into a standard type recording/reproducing machine. By using a mechanism in which a rotary body is connected to the tape pull-out means that is substantially the same as the tape path of the tape cassette, and by providing a means for biasing the rotary body in a predetermined direction, the tape pull-out means can have an extremely simple structure. It is an object of the present invention to provide an adapter for a tape cassette which can be used as a tape cassette and which can ensure a reliable tape drawing operation.

A small tape cassette (hereinafter sometimes referred to as a small cassette) used in a recording/playback machine such as a video tape recorder is used in a recording/playback machine that is equipped with a larger tape cassette, such as a standard type tape cassette. To do this, an adapter is required to convert the small tape cassette 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, the tape path is the same as that of a standard type tape cassette, so
It's not that small. Therefore, in order to make a small tape cassette substantially smaller, it is necessary to make the tape path of the small tape cassette different from the tape path of a standard type tape cassette, for example, by adjusting the supply reel in the tape cassette. 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 on 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. The present application has been made in accordance with the above object, and examples thereof will be described below.

Figure 1 is a perspective view of a tape cassette that is smaller than a standard tape cassette that is used, for example, in a standard recording/reproducing machine, with its front lid open, and Figure 2 is a perspective view of the upper half of this small cassette. FIG. 3 is a sectional view.

In the figure, A is a small cassette, and the frame of this small cassette A consists of an upper half, a lower half 2, and a front cover 3 for protecting the tape. It is rotatably attached to the support shaft 4 by means of 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, a predetermined running path between the supply reel 8, the supply reel 8, and the take-up reel 9 is connected to the magnetic tape 10.
The magnetic tape is arranged so that it runs. That is, the magnetic tape 10 is wound from the supply reel 8 onto the take-up reel 9 via the guide holes 11a, 12a, 12b, and 11b.
An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8, and this lower flange 1
An uneven groove 15 that engages with the uneven groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of No. 3, and a plate spring 16 attached to the upper half 1
The supply reel 8 is urged toward the lower half 2 by the action of , and the uneven grooves 14 and 15 engage, the supply reel 8 is fixed, and the slack in the magnetic tape wound on the supply reel 8 is absorbed. Preventing. Note that when the small cassette A is installed in the recording/reproducing machine, the supply reel 8 is connected to the supply reel disk 2 of the recording/reproducing machine.
6, the leaf spring 16 is attached to the upper half 1 side by a specified amount.
The grooves 14 and 1 are lifted up against the repulsive force of the grooves 14 and 1.
The meshing with 5 is released so that it can rotate.
That is, a hole 17 for inserting the supply reel disk 26 of the recording/reproducing machine is formed in the lower half 2 at a position corresponding to the supply reel 8, and the supply reel disk 26 is inserted into the supply reel 8. Become so. Moreover, the take-up side reel 9 is the lower half 2
It is inserted into and arranged on a shaft 18 fixed to the shaft 18, so that it can rotate around this shaft 18.

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 20 that presses the upper surface of the peripheral edge of the lower flange 19 of the take-up reel 9. This brake 20 is inserted into a shaft 21 formed integrally with the lower half 2, and is mounted on a spring. In the state where it is pressed and energized by the action, the shoe portion 20a of the brake 20 comes into pressure contact with the surface of the lower flange 19, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen.
Note that when the small cassette A is attached to a recording/reproducing device or an adapter described later, a force is applied that resists the repulsive force of the spring, the shoe portion 20a of the brake 20 is separated from the lower flange 19 surface, and the take-up reel 9 is rotated. Be able to move. The rotation of the take-up reel 9 is as follows:
Unlike the system of the supply reel 8, teeth 2 formed on the peripheral side surface of the lower flange 19 of the take-up reel 9
This is done by means of a driving force transmission medium meshing with 2. Therefore, a notch 23 is formed in the lower half 2 so that the driving force transmission medium can mesh with the teeth 22 when the small cassette A is attached to a recording/reproducing machine or an adapter to be described later.

4 and 5 are schematic explanatory views of the tape cassette adapter.

In the figure, B is a tape cassette adapter (hereinafter referred to as
(sometimes simply called an adapter), and this adapter B has a front cover 30, an upper half 31, and a lower half 3.
A storage section A' for storing a small cassette A is formed.

Reference numeral 33 denotes an operating lid that is provided on the back of the adapter B so that it can be opened and closed by a support shaft 34. When the operating lid 33 is opened as shown by the two-dot chain line, it is slidably provided by known means. sliding lever 3
5 moves, presses one end of an L-shaped lever 37 provided around the support shaft 36, and rotates it clockwise. By rotating the L-shaped lever 37, the connector 38 connected to the other end is moved to the left in the figure and downward in the figure, so that the tip of the connector 38 is attached to the support shaft 39 of the front cover 30. In order to push the provided protrusion, the front lid 30 is opened (opened) by the above operation.
In addition, 40 is a spring, and this spring 4
The L-shaped lever 37 is urged counterclockwise by the zero force, and the front cover 30 is maintained in the closed state unless the operation cover 33 is opened.

In addition, this adapter B is provided with a tape pull-out mechanism, that is, the front cover 3 of the small cassette A can be removed without pulling out the magnetic tape from the small cassette A.
Loading levers 41 and 42 will be located in the notch 24 of small cassette A when set in storage compartment A' in an open state, and guide rollers 43 provided at the tips of these loading levers 41 and 42. , 44. When the operation lid 33 is opened, the operation lever 45, which is an operation member for performing a tape loading operation, is provided at a position where the device can be loaded. The operation lever 45 is moved from the solid line position in FIG. 5 to the two-dot chain line position. When driven, the loading levers 41 and 42 are rotated from the solid line position to the two-dot chain line position, and the magnetic tape in the small cassette A is pulled out by the guide rollers 43 and 44 to form a predetermined tape path. For this purpose, as a driving force transmission medium of the loading lever 41, a gear 46 rotatably attached to the axis of the operating lever 45, a pin 47 implanted in the operating lever, and a gear to which this pin 47 is engaged. 46, a gear 49 which is a rotating body that meshes with the gear 46, and a gear 5 that meshes with the gear 49 and is attached to the rotating shaft of the loading lever 41 in order to rotationally move the loading lever 41.
0. A torsion coil spring 51, which has one end attached to the gear 49 and the other end rotatably attached to the shafts of gears 82 and 83, which will be described later, in order to bias the rotation of the gear 49 in a predetermined direction, and a loading lever. pins 52 and 52' that regulate the rotation angle of the loading lever 41, a connector 53 attached to the pin 47 as a driving force transmission medium of the loading lever 42, and a rotation angle connected to the connector 53 and the loading lever 42 A lever 54 and the like are arranged.

When the operating lever 45 is rotated from the solid line position to the two-dot chain line position in FIG. The magnetic tape is rotated to the position indicated by the dotted chain line, and the magnetic tape is pulled out from the small cassette A by the guide roller 44.
Further, as the operating lever 45 rotates, the gear 46 also rotates in the same direction due to the engagement between the pin 47 and the recess 48. Therefore, the gear 49 meshing with this gear 46 rotates counterclockwise, and the gear 50 also rotates clockwise in conjunction with this, so that the other loading lever 41 is moved away from the solid line position. It rotates to the position indicated by the dashed dotted line and stops when it hits the pin 52'. Therefore, the magnetic tape is pulled out from the small cassette by the guide rollers 44, 43, forming a tape path substantially similar to that of a standard type tape cassette. still,
As described above, when the operation lever 45 is operated, the operation cover 33 is in an open state, so the front cover 30 of the adapter B is opened as described above, and the loading lever 41 is opened when forming a tape path.
has never collided with the front cover 30.

As details of this loading lever 41 driving force transmission mechanism are shown in FIGS. 6 and 7, the operating lever 45 can close the operating lid 33 when the guide roller 43 is in the before and after tape drawing positions. It is set as follows. In other words, due to incorrectly reliable drive transmission of the tape drawer due to incomplete gear engagement, etc., the tip of the operating lever 45 may become locked to the operating lid 33, making it impossible to close the operating lid 33, which is an inconvenience. To avoid this, pin 47 and recess 4
The pin 47, that is, the operating lever 45, is configured to have some play in locking 8, and the pin 47, that is, the operating lever 45, is configured to be able to rotate to some extent, so that even if inaccurate drive occurs, the operating lever 45 cannot be moved inside the operating lid 33. Consideration has been given to the location.

Furthermore, the torsion coil spring 51 is attached by having one end thereof locked in the hole of the gear 49, but the attachment position is as follows before the tape is pulled out by the guide roller 43. That is, in the case of the state shown in FIG. 6, the other end of the torsion coil spring 51 is located below the imaginary line connecting the axial center point of the gears 82 and 83 to which it is attached and the rotational center point of the gear 49. In the state where the tape is pulled out by the guide roller 43, that is, in the state shown in FIG. 7, the tape is located above the virtual line. With this configuration, in the state shown in FIG. 6, the spring force of the torsion coil spring 51 applies a clockwise force to the gear 49, and in the state shown in FIG. Due to the spring force of the torsion coil spring, a counterclockwise force is applied to the gear 49, and the operation lever 45
Even if the stopping position of the loading lever 41 deviates to some extent, the loading lever 41 will not be stopped at a halfway position. That is, even if the meshing of each gear is not perfect and there is a loss in drive transmission force, the torsion coil spring 51 plays the role of compensating for this drive loss with spring force.

Also, the spring force of the torsion coil spring 51 in the tape pull-out direction (the spring force at the so-called tape loading completion end when the tape is pulled out from the small cassette to form a tape path as shown in FIG. (spring force to rotate clockwise) and spring force in the tape storage direction (spring force at the end of so-called tape unloading, where the pulled out tape is stored in a small cassette as shown in FIG. The ratio of the spring force to the clockwise rotation (spring force) is configured such that the ratio in the tape pull-out direction is large. This is because the guide roller 43 is loosely regulated by the operating lid 33 with the operating lever 45 in the closed state, and the torsion coil spring 51 prevents the guide roller 43 from fluctuating within this loosely regulated range. Because it is. More specifically, when comparing the external force applied to the guide roller 43 at the end of tape loading and the external force applied to the guide roller 43 at the end of tape unloading, it is greater at the end of tape loading. That is, at the tape loading completion end, the guide roller 43 is subjected to the forces received when loading the tape onto the drum by the loading arm of the device, the external forces received when the tape is running, especially when the tape is running at high speed, etc. Therefore, it is particularly desirable that the loading lever 41 be firmly stationary. On the other hand, guide roller 4
If 3 is the end of tape unloading completion,
The vibrations received during transportation of the adapter do not pose a problem in terms of performance, and when comparing these two, the external force that is applied to the guide roller 43 at the end of tape loading is naturally larger.

In view of this situation, it is better to install and set the force amount of the torsion coil spring 51 so that the force amount at the tape loading completion end is larger than the force amount at the tape unloading completion end as described above. It becomes reasonable. In other words, by effectively utilizing the force of the torsion coil spring, the spring force of the torsion coil spring 51 is unnecessarily increased (if the spring force is increased, the operability of tape loading and unloading operations decreases). In addition, the necessary and sufficient holding state of the guide roller 43 can be obtained at each of the tape loading completion end and tape unloading completion end. still,
To adjust the spring force ratio, for example, as shown in FIG. 6, the gears are disengaged while the guide roller 43 and operating lever 45 are kept in the same position as before the tape was drawn out, and the spring force in the tape drawing direction is adjusted. If you want to increase the force, rotate the gear 49 clockwise to position it while keeping the gear 49 and torsion coil spring 51 engaged, and conversely reduce the spring force in the tape drawing direction. 6, the gear 49 is shifted counterclockwise from the position shown in FIG. If the spring force is applied in the tangential direction, the actual spring force (the force that tries to rotate the gear 49) will be large, and the direction of the spring force applied to the gear 49 by the torsion coil spring 51 will be different from the tangential direction of the gear 49. If they are set in a different direction (approximately radial direction), the actual spring force will be small, and this can be done by meshing the gears after being adjusted in this way, making it an extremely simple adjustment operation. Therefore, as shown in FIG.
1, the direction of the spring force applied to the gear 49 is approximately tangential to the gear 49 at the loading completion point, and further, as shown in FIG. Then, the gear 49 at the loading completion end
The substantial rotational force is greater than the rotational force at the point where unloading is completed.

Moreover, after the guide roller 43 has pulled out the tape, that is, in the state shown in FIG. 7, unreasonable tension is applied to the tape while the tape is running, and an unexpected situation may occur in which the loading lever 41 is rotated counterclockwise. In this case, this force tends to rotate the operating lever 45 due to the rotation of the loading lever 41, but the rotation of this lever 45 beyond the above-mentioned play is restricted by the operating lid 33 in the closed state. Therefore, the loading lever 41 does not fluctuate much beyond the specified amount. Therefore, it is possible to prevent an accident in which the loading lever 41 is displaced from a predetermined position and the loading pole or capstan of the recorder/player enters in this state and collides with each other, damaging each other. Furthermore, when loading the tape, the guide roller 43 stops at an incomplete position, and in this state, the front cover of the adapter is closed by using the operating cover 33 for the closing operation as described above. Also, accidents such as crushing the tape between the guide roller 43 and the front lid will not occur.

Reference numeral 55 denotes a connector lock member, which prevents the operation lever 45 from being operated when the small cassette A is not stored in the storage section A'. This connector lock member 55 is configured in an L-shape, and one end 56 side thereof is formed in a tapered shape, and this one end 56 side is made to protrude into the storage section A', so that the small cassette A can be inserted into the connector lock member 55. When the small cassette A is stored in the storage section A', the small cassette A comes into contact with the tapered part of the connector lock member 55 and presses the tapered part side, so that the connector lock member 55 moves around the support shaft as shown in FIG. Spring 5 biased counterclockwise
7 in the clockwise direction, the engagement between the other end 58 of the connector lock member 55 and the concave portion of the connector 53 is released, and the operating lever 45 can be driven. In addition, when taking out the small cassette A from the adapter B, the operating lever 4
5 has been returned from the two-dot chain line position to the solid line position, so the connector lock member 55 is returned by the force of the spring 57, and the other end 58 of the connector lock member 55 and the connector 53 are engaged. And it's starting to lock up. still,
It is more effective if such a locking mechanism is provided in the connector 35.

59 is a protrusion to prevent incorrect insertion when attaching adapter B to a recording/reproducing device;
When the operating lever 45 is driven from the solid line position to the two-dot chain line position in FIG. When a predetermined tape path is not formed, it protrudes from the outer wall surface of the tape B, and is attached to, for example, the rotating arm 60 of the loading lever 42.

Reference numeral 61 denotes a generally L-shaped small cassette locking member that rotates in accordance with the movement of the connector 53. After storing the small cassette A in the storage section A', this locking member 61 is used to move the operating lever 45 to the fifth position. When driven from the solid line position to the two-dot chain line position in the figure, the connector 53
The locking member 61 rotates clockwise due to the movement of the locking member 61.
This prevents the small cassette A from being taken out from the adapter B when one end part pulls out the tape from the small cassette A to form a predetermined tape path.

When the small cassette A is installed in the storage part A' of the adapter B, the brake shoe 20a, which is a brake mechanism for the take-up reel 9 of the small cassette A, is activated by the pin provided in the storage part A' of the adapter B. A force is applied to resist the repulsive force of the spring, and the take-up reel 9 becomes rotatable. However, if the small cassette A is stored in adapter B and adapter B is used twice, the take-up reel 9 becomes rotatable. When the side reel 9 rotates, the magnetic tape wound on the take-up reel 9 may become slack. Therefore, when the small cassette A is stored in the adapter B, even if the brake function immediately after the take-up reel 9 is released, the brake function is applied to the take-up reel 9 by other means. It is preferable to leave it as is. Incidentally, since the brake function of the supply reel 8 is not released unless it is attached to a recording/reproducing machine, such a means is not necessary.

The indirect braking function for the take-up reel 9 is, for example, when the small cassette A is stored in the storage section A' of the adapter B. 76, a gear 77 that is provided coaxially with this gear 76 and rotates; a gear 78 that meshes with the gear 77 and rotates by the driving force of the take-up side reel disk of the recording/reproducing machine; and a gear 78 that meshes with this gear 78; a gear 79 that rotates coaxially with the gear 79; a gear 80 that rotates coaxially with the gear 79; a gear 81 that meshes with the gear 80; a gear 82 that meshes with the gear 81; a gear 83 that rotates coaxially with the gear 82; Gear 84 meshing with gear 8
A brake means is disposed on at least a part of the gear 85 which is provided coaxially with the gear 85 and rotates. For example, this brake means is provided with a brake lever 87' that is biased clockwise by the force of a spring 86 around the support shaft of the operating lever.
A brake lever 87'' is disposed at the tip of 7' and is connected to each other by a pin and a recess, and is biased counterclockwise around the shafts of gears 84 and 85. The shoe portion 87a is configured to come into pressure contact with the shafts of the gears 82, 83 that rotate clockwise. Therefore, if the adapter is not attached to the recording/reproducing device, the tip shu portion 87a is connected to the gears 82, 8.
Even if the direct braking function for the take-up reel 9 is released by this braking action, the take-up reel 9 will fluctuate, causing the tape wound on the take-up reel 9 to When you relax, the pain disappears. In particular, this brake shoe portion 87
A is configured so that the brake is applied only when the shaft to which the gears 82 and 83 are attached rotates clockwise, and when the shaft to which the gears 82 and 83 are attached rotates counterclockwise. The brake is configured to act only on rotational force in one direction so that the brake does not act when the brake is applied. That is, this brake means is configured to only prevent the tape wound on the take-up reel 9 from wobbling in the direction of loosening. Therefore, in order to take out the small cassette A from the adapter B, and to rewind the tape formed across the portion of the adapter B into the small cassette A, the tape should be engaged with the gear 85 and the gear 85 should be rotated clockwise. It is only necessary to rotate the operation lever 45 so as to drive the brake shoe part 8.
7a does not get in the way. Also, spring 8
Since the force 6 is not large but moderate, the pressing force of the brake shoe part 87a due to the force of the spring 86 is not large but moderate, and therefore the winding force is not large but is moderate. The tape can be prevented from loosening, and a predetermined tape path can be formed by driving the operating lever 45 from the solid line position in FIG. 5 to the two-dot chain line position. This means that when the operating lever 45 is driven from the solid line position in FIG. The tape path forming operation is not sudden, and therefore the tape is not pulled out more than necessary and the tape is not damaged.

To release the indirect braking function on the take-up reel 9 using this brake lever, when the adapter B with the small cassette A attached is attached to the recording/reproducing device, the pin provided on the recording/reproducing device is inserted into the hole 88 of the adapter B. The lever enters the brake lever 87' and presses the tapered portion that is a part of the brake lever 87', thereby rotating the brake lever 87' counterclockwise against the repulsive force of the spring 86. This rotational force releases the brake applied to the shaft of the gear 82 (83) by the brake shoe portion 87a, so that the magnetic tape is wound from the supply reel 8 to the take-up reel 9 and travels.

A one-way clutch is constructed between the gears 82 and 83, and the brake is applied to the front stage of the drive mechanism near the loading lever 41 of this clutch mechanism, so that the tape can be removed from the small cassette. When drawing out the tape to form a predetermined tape path, if the tape tension is strong, the one-way clutch that applies the braking force will work and spin idly, and there will be no problem where the braking force will not be applied to the take-up reel.

The take-up reel 9 is driven by the flange 19 under the take-up reel 9 by operating the operating lever 45 during tape storage (tape unloading).
A gear 76 that meshes with the teeth 22 formed on the peripheral side surface of the
This is done by driving the gears 85 and 85, as shown in FIGS. 8 and 9.
When the gear part 89 of the operating lever 45 is engaged with the gear part 89, a series of gears are rotated. In particular, when the operating lever 45 is rotated from the solid line position in FIG. However, when the rotational force reaches the position indicated by the two-dot chain line (in this state, a predetermined tape path is formed by the rotational movement of the loading levers 41 and 42), the rotational force is transmitted to the gear portion 89 and the gear 85. The gear 89 included in the operating lever 45 is formed, for example, in a fan shape so that the gear 89 can be disengaged from the meshing state. Therefore, after a predetermined tape path is formed, the gear portion 89 and the gear 8
5 is disengaged, so even if you store the small cassette A and attach the adapter B with the specified tape path to the recording/playback machine and turn on the recording/playback machine, the recording/playback machine will not work. The driving force from the take-up side reel disk is not transmitted to the operating lever 45.

Recesses 90 and 91 are formed at predetermined positions in the portion of the operating lever 45 where the gear portion 89 is not formed, and an engaging member 93 having a roller 92 at its tip corresponds to these recesses. It is provided. That is, when the operating lever 45 is placed in the state shown by the solid line in FIG. Recess 90
5, the operating lever 45 is fitted in the position shown in FIG. , the roller 92 of the engaging member 93, which is biased clockwise by the force of the spring 94, fits into the recess 91,
The operating lever 45 is regulated at that position, and the gear portion 89 of the operating lever 45 and the gear 85 are maintained out of mesh. Therefore, even if some impact force is applied to the adapter, the operating lever 45 will not move unnecessarily due to the rollers and recesses of the engaging member 93, and the rotation operation of the operating lever 45 will be moderated. It becomes something that can be given. Note that when the operating lever 45 is in the position shown by the two-dot chain line in FIG.
Even if the fitting state of the operating lever 45 is removed, the operating lever 45 will not be inadvertently rotated by the operating lid 33, and there is no possibility that the gear portion 89 of the operating lever 45 and the gear 85 will mesh with each other. becomes.

Note that the moderation mechanism for the operating lever 45 is not limited to the above-mentioned configuration, and does not include the engaging member 93, the roller 92, and the recesses 90, 91, but may include, for example, a recess 95 formed at a predetermined position of the operating lever 45,
For this recess 95, for example, a repellent moderation member is provided on the ceiling of the upper half of the adapter in accordance with the solid line position and the two-dot chain line position of the operating lever 45 in FIG. When the moderation member is in the solid line position in FIG. 5, the moderation member corresponding to this position fits into the recess 95 to regulate the position of the operating lever 45, and when the operating lever 45 is in the two-dot chain line position in FIG. In some cases, a moderation member corresponding to this position may be configured to fit into the recess 95 to regulate the position of the operating lever 45.

The gear portion 89 of the operating lever 45 and the gear 85 are
If the meshing state may be disengaged, that is, after the operating lever 45 is operated to pull out the tape from the small cassette A and form a predetermined tape path, the gear portion 89 and the gear 85
For example, when the operating lever is moved from the two-dot chain line position to the solid line position in FIG. 5 after a recording/reproducing operation, the gear portion 89 and the gear 85 come to mesh with each other. At the start of this gear meshing, if the teeth of the gear parts 89 and 85 are normal, for example, simply trapezoidal, there is a possibility that the meshing of the gear part 89 and the gear 85 will not proceed smoothly. , for example, gear 8 as shown in FIG.
By making the shape of the teeth of 5 more deformed than a trapezoidal shape and forming the tips of the teeth into a tapered shape, the teeth of the gear portion 89 can smoothly mesh with the gear 85, and the operation lever 45 can be rotated. When rotating in the clockwise direction, the gear portion 89 and the gear 85 are reliably engaged, and the take-up reel 9 is smoothly rotated in the tape winding direction.

A friction clutch is interposed between the gears 84 and 85, and the driving force is transmitted in the tape winding direction, and the force in the winding direction is transmitted to the winding reel 9. , when rotating in the opposite direction, the take-up reel is not directly driven due to the presence of the one-way clutch.

Also, in order to rewind the tape into the small cassette A from a state where a predetermined tape path has been formed,
The operation lever 45 may be rotated counterclockwise to apply a driving force in the winding direction to the winding reel 9, but in this case, the winding diameter of the winding reel (i.e., the The winding diameter varies depending on how much tape is wound on the side reel 9).The extent to which the operating lever 45 must be rotated to completely cover the tape in the tape path formed outside the small cassette A. The difference is how it winds up. In other words, when winding a certain length of tape, if a long tape is already wound on the take-up reel 9, the take-up reel 9 has a long winding diameter.
The rotation angle of the take-up reel 9 may be small; in a state where no tape is wound on the take-up reel 9, the rotation angle of the take-up reel 9 must be large because the take-up diameter is short.

Therefore, in this adapter, in consideration of the above, in the correlation between the rotation angle of the operating lever 45 and the take-up diameter of the take-up reel 9, the operating lever 4
5 must be rotated to the maximum extent (5th
(When rotating from the two-dot chain line position to the solid line position in the figure)
For example, if the operating lever 45 is rotated to the Z position, the tape may be completely wound up on the take-up reel 9. In the case, further X,
To prevent damage if the tape is forcibly stretched even when the operating lever 45 is rotated to the Y position, the gears 84 and 85 are of a friction clutch structure, so that the operating lever 45 is rotated before the tape is forcibly stretched. It is configured to spin idle.
The rotation from the X to the Y position is designed to allow extra winding in case of unexpected tape slack.

FIG. 10 is an explanatory view of the main part of the tape winding drive when the tape is stretched out for a long time and slack occurs in the tape path when the tape is pulled out.

That is, in this mechanism, a cylindrical part 100 is integrally formed on the upper side of the gear 82, an annular recess 101 is formed in the upper part of the cylindrical part 100, and washers 102, 10 are formed in the upper part of the cylindrical part 100.
3 is inserted into the shaft, and a gear 83 is disposed on the upper part of the gear 83, and the gears 82 and 83 have a one-way clutch structure. I'm starting to do that. Furthermore, gear 8
One end of a coil spring 105 is inserted and locked into the hole 104 formed at a predetermined position of 2, and the other end of the coil spring 105 is arranged around the cylindrical portion 100 so as to wrap the coil spring 105. The slit washer 108 is inserted into the hole 107 of the cylindrical body 106 and locked, and the slit washer 108 is inserted into the annular recess 101 of the cylindrical part 100.
The cylinder body 106 is restricted from moving upward, and a brake shoe portion 87a is provided on the circumferential side of the cylinder body 106.
are in pressure contact with each other, and a braking force is applied in the tape pulling direction.

In such a configuration, when the operating lever 45 is rotated clockwise to pull out the tape and form a predetermined tape path, the driving force of the operating lever 45 is transferred to the loading lever 41 via the gears 46, 49, and 50. The tape is pulled out by the guide roller 4 to form a predetermined tape path. During this operation, the tape tension is generated at the periphery of the lower flange of the take-up reel 9. gears 76, 7 through teeth 22
7, 78, 79, 80, 81, and 82, the gear 82
is rotated clockwise, and the cylindrical body 10
6 is restricted from rotating by the brake shoe portion 87a, so the coil spring 105 that is engaged with the gear 82 and the cylinder body 196 is charged with a force that urges the coil spring 105 to rotate in the clockwise direction. Become. Therefore, even if, for example, the operating lever 45 is turned too vigorously and excess tape is pulled out, when the force in the tape path forming direction is released after the tape path forming operation is completed, the coil spring 10
The gear 82 rotates counterclockwise due to the force charged in step 5, which operates the tape winding and storing mechanism using the gear, winds up the excess tape onto the winding reel 9, and returns the tape to normal tape. A path will be formed.

In addition, the force of the coil spring 105 is not so large and is smaller than the braking force of the supply reel if the tape is not pulled out excessively when forming a tape path, so when the tape is wound and idle, It has become something like never before. The force charged in the coil spring 105 is released when the adapter is attached to the recording/reproducing device because the brake shoe portion 87a is separated.

Note that 109 is an annular recess into which the cylindrical body is fitted. As described above, since the tape cassette adapter according to the present invention is constructed as described above, the drive means for forming a tape path that is substantially the same as that of a standard type tape cassette, for example, is provided by three gears. It can be constructed extremely easily and at low cost, and by simply attaching, for example, a torsion coil spring to the gear, the driving force transmission of the gear can be improved, and in conjunction with the stopper, the tape path can be formed accurately. become something that Moreover, since the biasing force at the tape loading completion end is larger than the biasing force at the tape unloading completion end, there is no need to unnecessarily increase the biasing force of this torsion coil spring.
The operability during unloading is not poor, and the tape is held sufficiently when loading is completed.Furthermore, the torsion coil spring is configured to bias the tape attachment part via the rotating body. Therefore, the biasing force can be easily adjusted and the operation by the biasing force is smooth.

[Brief explanation of drawings]

Figures 1 to 3 are explanatory diagrams of small cassettes, Figure 4
5 and 5 are schematic explanatory views of one embodiment of the tape cassette adapter according to the present invention, and FIGS. 6 and 7 are
The figure is an explanatory view of the main parts of the tape cassette adapter according to the present invention, and FIGS. 8 to 10 are partial explanatory views of the tape cassette adapter. A...Small cassette, B...Adapter, 33...Operation lid, 41...Loading lever (tape pull-out member), 43...Guide roller, 45...Operation lever,
(operating member), 46, 50... gear, 49... gear (rotating body), 51... torsion coil spring.

Claims (1)

[Scope of Claims] 1 Used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or reproducing machine, and the tape is pulled out from the small tape cassette attached to a storage section. An adapter for a tape cassette that forms a predetermined tape path with an operating member, a rotating body that is linked to the operation of the operating member, a tape pull-out member that pulls out the tape in conjunction with the operation of the rotating member, and one end of the tape cassette adapter. a torsion coil spring that is locked to a peripheral edge of the rotating body and whose other end is rotatably locked to a fixed shaft, and the torsion coil spring has a locking position on the peripheral edge that is at the center of rotation of the rotating body. When the rotating body is on one side of the straight line connecting the fixed axis and the fixed axis, the rotating body is rotated and biased in the direction in which the tape pull-out member is biased in the tape unloading direction, and when it is on the other side, the rotating body is The rotating body rotates and biases the tape pull-out member in the tape loading direction, and the biasing force of the torsion coil spring at the tape loading completion end is applied to the tape unloading completion end. A tape cassette adapter characterized in that it is configured to have a force greater than the biasing force.