JPS6017094Y2 - tape cassette - Google Patents

Description

[Detailed description of the invention] The invention relates to a tape cassette, in which the supply reel is supplied so that several loincloths rotate around a reel disk of a recording/reproducing device, and the reels rotate around a fixed shaft. By configuring the rotation center axis of the side reel and take-up reel,
To provide a tape cassette in which the tape disposed between a supply reel and a take-up reel runs smoothly and well, and the tape feeding accuracy is extremely excellent.

1a, b, and Ct d are smaller cassettes than standard type cassettes, which are used when attached to a recording/reproducing apparatus such as a standard type video tape recorder, for example, tapes used when attached to a recording/reproducing apparatus such as a porta-plive. These are a plan view, a side view, a rear view, and a bottom view of a small-sized cassette with a small amount. Fig. 2 is a plan view of the small-sized cassette with the upper half removed, Fig. 3 is a cross-sectional view, and Figs. 4 and 5. and the sixth
The figure is a partially enlarged explanatory view of a small cassette.

In the figure, A is a small cassette, and this small cassette A
The frame body consists of an upper half 1, a lower half 2, and a front cover 3 for protecting the tape, and the front cover 3 has a hinge portion 4 formed by molding a part thinly of resin such as polypropylene. The front cover 3 is normally biased in the closing direction by the action of the leaf spring 5 and attached to the half 1.

A hole 6 is formed in the lower half 2, and a projection 7 is formed in the front lid 3.
is formed, and when the front cover 3 is closed, the protrusion 7 is engaged with the hole 6, and the front cover 3 is locked.

Then, by pressing the protrusion 7 and moving it backward, the locked state between the protrusion 7 and the hole 6 is released, and the leaf spring 5 is released.
The front cover 3 can be opened by rotating against the repulsive force of the front cover 3.

Inside this small cassette A, there is a supply reel 8 of a type in which diameters a1 and a2 of the shaft portion and flange portion around which the magnetic tape is wound are large, and a supply side reel 8 having a diameter a1 and a2 of the shaft portion and flange portion around which the magnetic tape is wound. A take-up reel 9 with a small diameter is provided, and the distance between the supply reel 8 and the take-up reel 9 is such that it is difficult to install a standard type recording/reproducing device that cannot be installed only with this small cassette A. The distance between the supply side and take-up side reel disks is shorter than that of the reel disk.

The magnetic tape 10 is arranged so that the magnetic tape 10 runs along a predetermined running path between the supply reel 8 and the take-up reel 9.

That is, the magnetic pulley 10 is wound onto the reel 9 several times from the supply reel 8 through the guide poles 11 and 12.

An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8.
is formed, and the uneven groove 1 of this lower flange 13 is formed.
An uneven groove 15 that can engage with the uneven groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the upper half 2.
Normally, the supply reel 8 is urged toward the lower nozzle 2 by the action of the leaf spring 16 attached to the leaf spring 71, and the uneven grooves 14 and 15 engage with each other, so that the supply reel 8 is fixed. This prevents the magnetic tape wound on the supply reel 8 from loosening.

A hole 8' is formed in the center of the lower end of the supply reel 8, and when the small cassette is installed in the recording and reproducing apparatus, the supply reel 8 is inserted into the supply reel disk 8 of the recording and reproducing apparatus.
0, the half 1 side is lifted by a specified amount against the repulsive force of the leaf spring 16, and the engagement between the uneven grooves 14 and 15 is released.

That is, in the lower half 2 at the position corresponding to the hole 8' of the supply reel 8, there is a supply reel disk 8 of the recording/reproducing device.
0 insertion hole 17 is formed, and this supply side reel disk 80 is inserted into the hole 8' of the supply side reel 8.

The take-up reel 9 is inserted into a shaft 18 fixed to the lower half 2 and is rotatable about this shaft 18.

The shaft 18 can be attached to the lower half 2, for example.
A groove 19 is formed in the lower part of the groove 19, and a protrusion 20 that fits into the groove 19 is formed on the lower half 2, and with the protrusion 20 fitted in the groove 19, the screw 21 is If the shaft 18 is screwed onto the lower half 2 by means of screwing, etc., the shaft 18 will not spin 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 provided at predetermined locations on the lower half 2 so that gears, for example, can be engaged with the teeth 23.
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 transferred from the supply reel through a predetermined running path to the take-up reel. It will be rolled up.

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 installed in the recording/reproducing apparatus.

This brake mechanism includes, for example, a pawl 25 that engages with teeth 23 of the lower flange 22 of the take-up reel 9.
is inserted into the shaft 26 of the lower half 2, and when it is pressed and biased by the action of the spring 27,
The pawl 25 hooks onto the teeth 23 of the lower flange 22, and the winding side -
The magnetic tape 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 claw 25 onto the spring 27.
The claw 25 and the lower flange 22 of the take-up reel 9 are raised at different levels, and the take-up reel 9 becomes free and able to rotate.

Note that the upper and lower halves of the small cassette are provided with a recess and a protrusion for latching at the joining end of the upper and lower halves. Temporarily fasten the halves and firmly connect them with screws.

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, B is an adapter that can accommodate the small cassette A inside and has a size and shape that can 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.
The lower half 51 has a storage section 53, which is a notch for storing the small cassette A.

This housing section 53 has protrusions 54, 55, 56, 57 formed at its ends to support the small cassette A, and the lower half 2 of the small cassette A has these protrusions 54, 55, 56.
．． Recesses 28, 29, 30, and 31 are formed corresponding to the positions of 57, and these projections and recesses help 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 substantially on the same plane.

In addition, pins 58 and 59 are implanted in the protrusions 54 and 55, and these pins 58 and 59 are connected to the lower half 2 of the small cassette A.
are inserted into the holes 32 and 33 formed in the pin 5, thereby further positioning the small cassette A.
8 also serves to release the brake of the take-up reel 9 of the small cassette A.

That is, the position of the pin 58 and the hole 32 is such that the pin 58 is in the hole 3
When the small cassette A is inserted into the
This position is such that the pin 58 lifts the pawl 25, which is the brake mechanism of the motor.

When adapter B with small cassette A inserted is attached to a standard type recording/playback machine, the supply side reel disk of the two reel disks of the recording/playback machine is small cassette A.
However, since the take-up reel disk cannot be inserted into the take-up reel 9, the adapter B is inserted at the position corresponding to the position of the take-up reel disk. A gear 60 is attached to the lower half 51, into which a take-up reel disk is inserted and driven.

Also, when storing small cassette A in 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 teeth is determined by the pin 58. Since it is released, 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/playback 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. For example, if the supply reel disk is placed on the supply reel, a gear similar to the take-up reel is installed at the position of the take-up reel disk, and this gear and the winding of the small cassette are connected to each other. A driving force transmission means is disposed between the reel and the reel (thereby, the driving force of a standard type recording/reproducing machine can be transmitted to the small cassette A.

Also, on both shoulders of the upper half of the small cassette A, there are notches 34.
35 is formed, and the upper half 52 of the other adapter B
Walls 62 and 63 are formed corresponding to the positions of the notches 34 and 35, and 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. Furthermore, the top surface of the small cassette and the top surface of the adapter are approximately on the same plane.

When using the above-mentioned small cassette A by attaching it to a recording/playback device exclusively for small cassettes, 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/playback 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. Notches 36, 37,
At 38, the loading pole, capstan, etc. of the recording and reproducing device are inserted inside the magnetic tape, and the supply reel disk of the recording and reproducing device is fitted to the supply reel of the small cassette, and the loading pole and capstan of the recording and reproducing device are inserted into the adapter B of the recording and reproducing device. The teeth of the lower flange of the take-up side IJ-rule mesh with a drive force transmission mechanism such as a gear to the take-up reel, so that the driving force of the recording/reproducing device is also transmitted to the take-up side reel.

Furthermore, a recess 2 formed in the lower half 2 of the small cassette
B, the convex part of the recording and reproducing device matches 29.30.31,
In addition, the pins of the recording and reproducing device are inserted into the holes 32 and 33 of the lower half, and the position of the small cassette A is regulated within the recording and reproducing device, and the lock state of the take-up reel of the small cassette A by the claw is released. , the magnetic tape is maintained in a runnable state.

Then, the magnetic tape is fed out in a small cassette by a loading pole, is tensioned to the magnetic head, and driving force is transmitted to the take-up reel so that the magnetic tape runs along a predetermined running path, and recording and reproduction are performed.

In addition, 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, store small cassette A in the storage compartment of adapter B,
In this stored state, a predetermined amount of the magnetic tape wound on the supply reel is pulled out from the front lid of the small cassette A, and the magnetic tape is inserted into the guide balls 64, 65, and 66 provided on the adapter B. Then, distribute the magnetic tape in the same way as the magnetic tape in a standard type cassette, align the upper half of adapter B with the lower half, and screw them together.

Since the small cassette A stored in the adapter B is the same as a standard type cassette, it can be used for recording and reproducing by installing it in a standard type recording and reproducing machine.

That is, when a small cassette is mounted on 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 lifts the pawl 25 against the repulsive force of the spring. The lock state of the take-up reel 9 is released, and the driving force of the take-up reel disk is transmitted to the take-up reel 9 via the gears 60 and 61.

Conversely, when the small cassette is removed from the adapter, the take-up reel 9 and the gear 61 are disengaged and the pin 58 is removed from the small cassette, so the claw 25 is restored by the repulsive force of the spring 27. The take-up reel 9 is in a locked state.

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 lower half of the adapter by hand, and attach the pulled-out magnetic tape to the guide pole of the adapter directly 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 lower flange of the take-up reel, it becomes convenient to attach and remove the small cassette from the adapter.

As described above, in the tape cassette of the present invention, the supply reel with the concave portion is arranged in correspondence with the hole formed in the cassette case, and the take-up reel is inserted into the shaft fixed to the cassette case. With this arrangement, the supply reel rotates around the reel disk of the recording/reproducing device, and the take-up reel rotates around the shaft fixed to the cassette case. So,
The reel disk of the recording/playback device is directly inserted into the supply reel and driven, so the rotation precision of the supply reel is high, the tape feeding precision is excellent, and the tape runs smoothly and well. In addition, the take-up reel, which does not require very high rotational accuracy, is indirectly driven to rotate by the drive source of the recording/reproducing device, and the position of the take-up reel is regulated by a fixed shaft. Therefore, the take-up reel does not wobble, and there is no need to add any special structure to prevent wobbling, which makes the construction easier.Furthermore, the tape cassette can be made smaller than standard tape cassettes. It also has features such as being able to

[Brief explanation of the drawing]

Figures 1a, b, c, d and Figures 2 to 6 are explanatory diagrams of embodiments of the tape cassette according to the present invention, and Figures 7 to 1.
FIG. 0 is an explanatory diagram of an adapter that accommodates a tape cassette. A: Small cassette, B: Adapter, 1: Upper half, 2: Lower half,
8... Supply side reel, 8'... Hole, 9
...Take-up reel, 10... Magnetic tape, 17... Hole, 18... Shaft, 80.
...Reel disc.

Claims (1)

[Scope of utility model registration request] By arranging the supply reel with a concave portion corresponding to the hole formed in the cassette case, and inserting the take-up reel into the shaft fixed to the cassette case, the supply reel The tape cassette is characterized in that the reel disk of the recording/reproducing device rotates around the axis, and the take-up reel rotates around the axis fixed to the cassette case.