JPH022229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reel drive device for a tape cassette in which the tape cassette is installed in a recording/playback machine to perform recording and playback, etc. If the spacing between the supply reel and take-up reel of the tape cassette is different from the spacing between the supply reel disk and the take-up reel disk that drive these reels, one reel of the tape cassette and one reel of the tape cassette The reel of the tape cassette is directly connected to the reel disk of the tape cassette by disposing a rotation transmission mechanism provided in the adapter for the tape cassette in which the tape cassette is housed between the reel flange of the other reel and the other reel disk. can be rotated, and the spacing between the supply and take-up reels of the tape cassette is approximately the same as the spacing between the supply and take-up reel disks that drive these reels. By directly connecting each reel disk to each reel of a tape cassette so that both reels can rotate, it is possible to play a tape even in a recording/playback machine of a different type than a certain type of tape cassette. To provide a reel drive device for a tape cassette which can drive the reel of the cassette and perform recording and reproduction.

For example, a standard type tape cassette is attached to a recording and reproducing machine such as a standard type video tape recorder for recording and reproducing. In order to perform recording and playback by installing a tape cassette smaller than the standard type tape cassette into such a standard type video tape recorder, the position of the supply side reel and take-up side reel of the small tape cassette must be set to the standard type. If the position of the supply reel disk and take-up reel disk corresponds to the position of the video tape recorder, there will not be much of a problem, but such tape cassettes are smaller than the standard type. do not become. Therefore, by making the distance between the supply reel and take-up reel of the tape cassette smaller than that of a standard type tape cassette, the tape cassette can be made substantially smaller. However, when attempting to install such a small tape cassette into a standard video tape recorder, the distance between the supply reel and take-up reel of the tape cassette may be too large to accommodate the supply reel disk of the video tape recorder and the take-up reel. Because the distance between the tape cassette and the reel disk is different, it is not possible to attach this small tape cassette to a standard video tape recorder and run the magnetic tape wound around the reel for recording and playback. Therefore, in such a case, it is sufficient to configure the supply side reel disk or take-up side reel disk of the video tape recorder so that it can be moved and set according to the reel interval of the tape cassette. However, in order to make the reel disk movable, the mechanism becomes extremely complicated, and it is not desirable to employ it in a recording/reproducing machine such as a video tape recorder.

The present invention eliminates the above-mentioned drawbacks, and one embodiment of a tape cassette reel drive device according to the present invention will be described below.

Figures a, b, c, and d are smaller than standard type cassettes used when attached to a recording/reproducing apparatus such as a standard type video tape recorder, for example, used when attached to a portable type recording/reproducing apparatus. These are a plan view, a side view, a rear view, and a bottom view of a small cassette with a small amount of tape. Fig. 2 is a plan view with the upper half of this small cassette removed, Fig. 3 is a cross-sectional view, and Figs. 4 and 5. 6 and 6 are partially enlarged explanatory views of the small cassette.

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 lid 3 for protecting the tape.
The hinge part 4 is formed by molding a part thinly of resin such as polypropylene, and the front cover 3 is normally biased in the closing direction by the action of a leaf spring 5, and the upper half 1 is closed. is attached to. A hole 6 is formed in the lower half 2, and a protrusion 7 is formed in the front cover 3. When the front cover 3 is closed, the protrusion 7 engages in the hole 6, and the front cover 3 has a lock. It's starting to take a while. By pressing the protrusion 7 and moving it backward, the locked state between the protrusion 7 and the hole 6 is released, and the front cover 3 can be rotated and opened against the repulsive force of the leaf spring 5. It's becoming like that.

A supply reel 8 and a take-up reel 9 are disposed in this small cassette A, and the distance between the supply reel 8 and take-up reel 9 is such that it cannot be installed with only this small cassette A. The distance is shorter than the distance between the supply side and take-up side reel disks of a standard type recording/reproducing device. The magnetic tape 10 is arranged so 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 the guide pole 11, 12 from the supply side reel 8.
After passing through the film, the film is wound onto the winding reel 9. An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8, and can also engage with the uneven groove 14 at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of the lower flange 13. An uneven groove 15 is formed, and the supply reel 8 is normally urged toward the lower half 2 by the action of a leaf spring 16 attached to the upper half 1, and the uneven grooves 14 and 15 engage with each other. , supply reel 8
is fixed to prevent the magnetic tape wound on the supply reel 8 from loosening. When the small cassette is installed in the recording and reproducing apparatus, the supply reel 8 is lifted by the supply reel disk 80 of the recording and reproducing apparatus by a specified amount toward the half 1 side against the repulsive force of the leaf spring 16. The engaged state between the uneven grooves 14 and 15 is released. That is, in the lower half 2 at a position corresponding to the supply reel 8, there is a hole 1 for inserting the supply reel disk 80 of the recording/reproducing device.
7 is formed, and this supply reel disk 80 is inserted into the supply reel 8.
Take-up reel 9, shaft 18 fixed to the lower half 2
The shaft 18 is inserted into the shaft 18 and is rotatable around the shaft 18. The shaft 18 can be attached to the lower half 2 by, for example, forming a groove 19 in the lower part of the shaft 18, and forming a protrusion 20 on the lower half 2 to fit into the groove 19. With the protrusion 20 fitted into the groove 19, screw the screw 21.
If the shaft 18 is screwed onto the lower half 2 using a screw or the like, the shaft 18 will not rotate idly during screwing, so it can be easily attached. Teeth 23 are formed on the outer periphery of the lower flange 22 of the take-up reel 9, and cutouts 24 are formed at predetermined locations on the lower half 2 so that gears, for example, can be engaged with the teeth 23. There is. Then, the take-up reel 9 is rotated by a predetermined driving force transmission mechanism such as a gear that meshes with the teeth 23, and the magnetic tape is wound from the supply reel through a predetermined travel path to the take-up reel. It becomes like this.

This take-up reel 9 is provided with a brake mechanism so that the take-up reel 9 does not rotate when the small cassette A is not attached to the recording/reproducing apparatus. This brake mechanism consists of, for example, a pawl 25 that engages the teeth 23 of the lower flange 22 of the take-up reel 9, and this pawl 25 engages the shaft 2 of the lower half 2.
6 and is biased by the action of the spring 27, the claw 25
is engaged with the teeth 23 of the lower flange 22, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen. In order to release this latched state and allow the take-up reel 9 to rotate, a pin is inserted through the hole formed in the lower half 2, and the pin is used to push the pawl 25 against the repulsive force of the spring 27. Lift the claw 25 against the lower flange 2 of the take-up reel 9.
2, the take-up reel 9 becomes free and can rotate.

In addition, in the upper half and lower half of the small cassette,
A locking recess and a protrusion are formed at the joint end of the upper half and the lower half, and the upper and lower halves are temporarily fastened by fitting the protrusion and the recess, and then screwed together. Strongly connect the two.

FIGS. 7, 8, 9, and 10 are explanatory diagrams of an adapter used when the above-mentioned small cassette A is attached to a standard type recording/reproducing apparatus.

In the figure, reference numeral B denotes an adapter that can accommodate the small cassette A therein and has a size and shape that allows it to be attached to a standard type recording/reproducing device.

The frame of this adapter B consists of a lower half 51 and an upper half 52, and the lower half 51 is formed with a storage section 53, which is a notch in which the small cassette A is stored. This housing section 53 has protrusions 54, 55, 56, and 57 formed at its ends to support the small cassette A, and the lower half 2 of the small cassette A has the protrusions 54, 55, 56, and 57 located at their positions. Concave portions 28, 29, 30, and 31 are formed corresponding to the cassette A, and these protrusions and concave portions are used to position the small cassette A, particularly in the vertical direction. When these protrusions and recesses are fitted, the bottom surface of the small cassette and the bottom surface of the adapter are made to be approximately on the same plane. Also, the protrusion 5
4 and 55 have pins 58 and 59 implanted,
The pins 58 and 59 are inserted into the holes 32 and 33 formed in the lower half 2 of the small cassette A, thereby further positioning the small cassette A. It also functions as a brake release. That is,
The positions of the pin 58 and the hole 32 are such that when the pin 58 is inserted into the hole 32, the pin 58 lifts the pawl 25, which is the brake mechanism of the take-up reel 9 of the small cassette A.

When the adapter B with the small cassette A inserted therein is attached to a standard type recording/playback device, the supply side reel disk of the two reel disks of the recording/playback device is inserted into the supply side reel 8 of the small cassette A. However, since the take-up reel disk cannot be inserted into the take-up reel 9, the adapter B at the position corresponding to the position of the take-up reel disk is
A gear 60 is attached to the lower half 51 of the winding-side reel disk, which is driven by the insertion of the winding-side reel disk. Further, when the small cassette A is stored in the adapter B, a gear 61 that meshes with the teeth 23 of the lower flange 22 of the take-up reel 9 of the small cassette A is attached to the lower half 51 so as to mesh with the gear 60. , and the state of engagement between the claw and the tooth is pin 58.
Since the magnetic tape is released by , the driving force of the recording/reproducing machine is transmitted to the supply reel 8 and take-up reel 9 of the small cassette A, and the magnetic tape begins to run. That is, even if you try to install small cassette A into a standard type recording/reproducing machine, the relative positions of the supply side reel and take-up side reel of small cassette A will be the same as the supply side reel disk and the take-up side reel disk of the recording/playback machine. Since it is not the same relative position as
For example, if the supply reel disk is placed on the supply reel, a gear similar to that of the take-up reel is provided at the position of the take-up reel disk, and the driving force is transferred between this gear and the take-up reel of the small cassette. By providing a transmission means, the driving force of a standard type recording/reproducing machine can be transmitted to the small cassette A.

Further, notches 34 and 35 are formed on both shoulders of the upper half 1 of the small cassette A, and walls 62 and 63 are formed in the upper half 52 of the adapter B in correspondence to the positions of the notches 34 and 35. When the upper half 52 is aligned with the lower half 51 and screwed together, for example, the small cassette A will not come out from the adapter B, and furthermore, the top surface of the small cassette and the top surface of the adapter will be almost the same. It is designed to be flat.

When using the above-mentioned small cassette A by attaching it to a recording/playback device exclusively for this small cassette, such as a portable type recording/playback device, attach a standard type cassette to the standard type recording/playback device. As in the case of use, when the small cassette is inserted into the pop-up mechanism of the recording/reproducing device and the pop-up mechanism is moved to the operating position, the front lid of the small cassette A opens, and the front cover of the small cassette A is opened. Notch 3
At steps 6, 37, and 38, the loading pole, capstan, etc. of the recording/reproducing device are inserted inside the magnetic tape, and the supply reel disk of the recording/reproducing device is fitted to the supply reel of the small cassette.
In addition, the teeth of the lower flange of the take-up reel mesh with a gear-like driving force transmission mechanism to the take-up reel in the adapter B of the recording/reproducing device, and the driving force of the recording/reproducing device is also transmitted to the take-up reel. Become so. Furthermore, the convex portions of the recording/reproducing device are aligned with the recesses 28, 29, 30, and 31 formed in the lower half 2 of the small cassette, and the pins of the recording/reproducing device are inserted into the holes 32, 33 of the lower half to record. The position of the small cassette A is regulated within the reproducing apparatus, and the locking state of the claw on the take-up reel of the small cassette A is released, so that the magnetic tape is maintained in a running state. Then, the magnetic tape is unwound from the small cassette by the loading pole, is attached to the magnetic head, and the driving force is transmitted to the take-up reel so that the magnetic tape runs along a predetermined running path, and recording and playback are performed. It will be done.

When using this small cassette A with a standard type recording/playback device, attach the small cassette A to the adapter B, and then attach this adapter B to the recording/playback device in the same way as when using a standard type cassette. Perform recording and playback. That is, first, with the front lid of small cassette A opened, small cassette A is stored in the storage section of adapter B, and in this stored state, the magnetic tape wound on the supply reel is opened and the front lid of small cassette A is opened. Pull out a predetermined amount of magnetic tape from the front cover, attach this magnetic tape to guide poles 64, 65, and 66 provided on adapter B, arrange the magnetic tape in the same way as the magnetic tape in a standard type cassette, and then insert the magnetic tape into the adapter. B
Align the upper half with the lower half and tighten the screws. Since the small cassette A stored in the adapter B is constructed in the same way as a standard type cassette, it can be recorded and reproduced by being attached to a standard type recording/reproducing machine. That is,
When the small cassette is attached to the adapter, the gear 61 of the adapter meshes with the teeth of the lower flange 22 of the take-up reel 9, and the pin 58 of the adapter engages the claw 2.
5 against the repulsive force of the spring, the take-up reel 9 is released from the locked state, and the driving force of the take-up reel disk is transferred to the gear 60,
61. Conversely, when the small cassette is taken out of the adapter, the engagement between the take-up reel 9 and the gear 61 is disengaged, and the pin 58 is removed from the small cassette, so that the claw 25 is restored by the repulsive force of the spring 27. , the take-up reel 9 is in a locked state.

In order to attach the magnetic tape in the small cassette to the guide pole of the adapter, for example, press the supply reel directly with your hand to release the locked state of the supply reel, and then open the front cover of the magnetic tape. Attach the small cassette to the bottom half of the adapter, and attach the pulled-out magnetic tape directly to the guide pole of the adapter by hand, or attach the unlocked magnetic tape to a suitable location. It can be attached using a pull-out mechanism.

Furthermore, if the gear 61 is configured to have a small degree of freedom in position setting, the gear 61 may be moved when, for example, a small cassette is attached to or removed from the adapter, and the gear 61 may be moved to the gear 60 during attachment. By allowing the cassette to mesh with the teeth of the take-up reel and the lower flange, it becomes convenient to attach and remove the small cassette from the adapter.

In the above embodiment, the interval between the supply side reel and the take-up side reel of the tape cassette is smaller than the interval between the supply side reel disk and the take-up side reel disk of the recording/reproducing machine; The same is true in the case of

By configuring the tape cassette reel drive device as described above, even if the distance between the supply reel and take-up reel of the tape cassette is different from the distance between the supply reel disk and the take-up reel disk, For example, it is not necessary to make the set position of the reel disk on the take-up side movable, and moreover, it is only necessary to provide an intermediate transmission means such as a gear in the part of the reel and reel disk where the reel and reel disk are not directly connected. This is extremely simple compared to the case where the reel disk is movable, and the reel drive mechanism is less likely to break down. If this intermediate transmission means is installed in an adapter that accommodates a tape cassette,
Even when recording and playing back a different type of tape cassette, you can simply store the tape cassette in the adapter and attach the adapter containing the tape cassette to the recording/playback machine, making it extremely convenient. Become something. Furthermore, in the tape cassette housed in the adapter, the distance between the supply reel and the take-up reel can be made smaller than the distance between the supply reel disk and the take-up reel disk, making this tape cassette extremely compact. It also becomes possible. In particular, in this embodiment, since the rotation transmission mechanism between the reel and the reel disk is arranged on the take-up reel and the take-up reel disk, it is arranged on the supply reel and the supply reel disk. Compared to the case where the rotation transmission mechanism is installed, the rotation transmission mechanism, for example, the arrangement precision of the gear is not required, and the installation of the rotation transmission mechanism becomes easier. That is, since the magnetic tape is driven by a capstan or the like, uneven winding rotation of the winding reel does not directly affect recording and reproduction.

As described above, in the tape cassette reel drive device according to the present invention, in the reel drive device for two tape cassettes having different reel intervals, the distance between the supply side reel and take-up side reel of the tape cassette is If the distance between the supply reel disk that drives the reel and the take-up reel disk is different, one reel of the tape cassette is directly connected to one reel disk, and the reel flange of the other reel is connected to the other reel disk. A rotation transmission mechanism provided in the tape cassette adapter in which the tape cassette is stored is arranged between the tape cassette and the reel disk so that the reel of the tape cassette can be rotated, and the supply side reel and take-up side reel of the tape cassette are If the distance between the two reel disks is approximately the same as the distance between the supply reel disk and the take-up reel disk that drive these reels, each reel disk is directly connected to each reel of the tape cassette. Since both reels are configured to rotate, the supply reel and take-up reel can be driven accurately and reliably, and even if the reel spacing and the reel disk spacing that drive the reels are different, for example, the reel There is no need to move the disks to match the reel spacing, and therefore a mechanism for moving the reel disks is not required, which simplifies the configuration.Also, the reel disks are less likely to break down, making it easier for certain types of tapes. The cassette can now be attached to any type of recording/playback machine for recording and playback, and if this drive mechanism is installed in the adapter that houses the tape cassette,
This tape cassette has the advantage that it can be easily and smoothly recorded and reproduced by simply storing the tape cassette in an adapter and attaching it to a recording/reproducing machine of a predetermined type.

[Brief explanation of drawings]

1A to 6 are explanatory diagrams of a tape cassette according to the present invention, and FIGS. 7 to 10 are explanatory diagrams of an adapter that accommodates the tape cassette. A...Small cassette, B...Adapter, 8...
Supply side reel, 9... Take-up side reel, 10... Magnetic tape, 22... Lower flange, 23... Teeth, 2
4...Notch part, 53...Storage part, 60, 61...
gear.

Claims (1)

[Claims] 1. In a reel drive device for two tape cassettes with different reel intervals, the interval between the supply reel and take-up reel of the tape cassette is the same as the supply reel disk and take-up reel disk that drive these reels. If the interval between
A rotation transmission mechanism provided in a tape cassette adapter in which one reel of the tape cassette is directly connected to one reel disk, and the tape cassette is stored between the reel flange of the other reel and the other reel disk. The reel of the tape cassette is arranged so that the reel of the tape cassette can be rotated, and the distance between the supply reel and take-up reel of the tape cassette is determined by the distance between the supply reel disk and the take-up reel disk that drive these reels. A reel drive device for a tape cassette, characterized in that a reel disk is directly connected to each reel of the tape cassette so that both reels can be rotated when the distance between the two reels is substantially the same.