JPH0424789B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a tape cassette (hereinafter referred to as a first tape cassette) which is a conventional tape cassette (hereinafter referred to as a first tape cassette) with a smaller external shape by narrowing the distance between the reels.
The present invention relates to a cassette adapter for making it possible to use a second tape cassette (referred to as a second tape cassette) on porcelain in which the first tape cassette is used.

Compared to compact tape cassettes for audio, tape cassettes used in video tape recorders and the like are considerably larger due to standards such as tape width and distance between reels, and even in portable equipment. Since the tape cassette is large, there is a limit to miniaturization, which is a major problem.

Also, with the current technology, there are problems with image quality.
It is also difficult to make small tape cassettes with narrow tape widths.

For this reason, as a means to downsize tape cassettes and equipment, the tape width is the same as that of the conventional first tape cassette, and the distance between the reels is set to approximately the same as that of the first tape cassette. In addition to reducing the amount to about 1/2, the amount of tape is also reduced to 1/2 compared to the full size of the first tape cassette.
A small second tape cassette with a capacity of about 4 to 1/6 has started to be considered.

With such a small second tape cassette, it is possible to obtain the same image quality as the current first tape cassette, and not only can the tape cassette itself be made smaller, but also the equipment that uses the tape cassette can be made smaller. However, since the amount of tape will be reduced, the recording time will be shorter than that of the current first tape cassette. Considering the recording time and miniaturization, it is desirable to change the tape cassette used depending on the purpose, etc.
This tape cassette is required to be compatible with the first tape cassette, that is, to be usable with equipment that uses the first tape cassette, and in order to satisfy this requirement, A cassette adapter will be required.

The present invention enables the guide roller for guiding the running of the magnetic tape to be easily and reliably fixed in such a cassette adapter, thereby ensuring stable transfer from the cassette adapter to external equipment at all times. The purpose is to be able to supply magnetic tape.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cassette adapter of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is a second tape cassette, and this second tape cassette 1 is a half case 2.
The reels 4 and 5 on which the magnetic tape 3 is wound are rotatably supported and housed inside, and a predetermined running path is formed on the front side so that the magnetic tape 3 is exposed to the outside. There is. In this second tape cassette 1, the reel 4 on the one supply side can be operated from the bottom side of the half case 2 through a window provided at the bottom of the half case 2, and the tip of the reel stand of the device is inserted into the hollow inside. The reel 5 on the other take-up side is rotatably supported by a reel shaft (not shown) embedded in the half case 2, and a gear portion 5a is formed on the outer periphery. The half case 2 is rotated by a gear on the drive source side that meshes with the gear portion 5a through a window on the side surface of the half case 2.

Reference numeral 6 denotes a main body case of the adapter. This main body case 6 has the same external dimensions as the first tape cassette, and the second tape cassette 1 is loaded into this main body case 6. This main case 6
At a position corresponding to the reel stand of the video tape recorder, a reel gear 7 which can be attached to the tip of one of the reel stands is rotatably supported, and the reel gear 7 is rotatably supported at the tip of the other reel stand. A window (not shown) is provided to allow the reel 4 of the second tape cassette 1 to be attached. One gear of an idler gear 8 having a two-stage gear structure meshes with the reel gear 7.
The gear portion 5a of the reel 5 of the second tape cassette 1 meshes with the other gear, and the rotation of the reel gear 7 rotates the reel 5 of the second tape cassette 1, causing the magnetic tape 3 to run.

A take-up side pull-out arm 9 in the shape of a fishing needle is arranged in the main body case 6 so as to rotate around a shaft 9a, and a second tape cassette is attached to one end of the take-up side pull-out arm 9. A guide roller 10 is attached for hooking one magnetic tape 3 and pulling it out to a predetermined position. This guide roller 10 is rotatable around a shaft 10a. In addition, a supply side pullout arm 11 is disposed at a position facing the takeup side pullout arm 9 of the main body case 6 so as to rotate around a shaft 11a, and one end of this supply side pullout arm 11 is also provided on the takeup side. Similar to the pull-out arm 9, a guide roller 12 is attached which is rotatable around a shaft 12a for hooking the magnetic tape 3 of the second tape cassette 1 and pulling it out to a predetermined position.
A knob 11b is provided at the other end of the supply side drawer arm 11, and the knob 11b is connected to the shaft 13a.
The connecting arm 13 is fitted into an elongated hole 13b of a dog-shaped connecting arm 13 which is arranged to rotate around . Further, a knob 13c is provided at the other end of the connecting arm 13.
The knob 13c is fitted into a long hole 14b of the connecting arm 14, which is arranged to rotate about a shaft 14a. This connecting arm 14
The other end engages with a knob 9b provided at the other end of the take-up side pull-out arm 9. Reference numeral 15 denotes a drive rack in which a pinion gear 16 that is rotated manually or by a drive source such as a motor is engaged, and a cam groove 15a is provided on the lower surface of the drive rack 15 into which the knob 9b of the take-up side pull-out arm 9 is fitted. It is being Cam groove 15 of this drive rack 15
a has a part that is parallel to the moving direction of the drive rack 15 and a part that is inclined, and as shown in FIG. At this time, the take-up side drawer arm 9 and the supply side drawer arm 1
1 extends outward and is located at the tape guide position of the first tape cassette, and as shown in FIG. The side drawer arm 9 and the supply side drawer arm 11 move inward and are in a state before the tape is drawn out. Further, a groove 15 is provided on the upper surface of the drive rack 15.
A cam surface 15c having a diameter b is provided, and the shaft 1
The tip 17b of the arm 17 is rotatable around 7a.
are in contact with each other, and when the drive rack 15 moves to a predetermined position, the tip 17b of the arm 17 is in the groove 1.
5b, thereby causing the arm 17 to be attached to the shaft 1.
It rotates around 7b. Tip 1 of this arm 17
One end of an L-shaped connecting angle 18 rotatable about a shaft 18a is connected to 7b via a connecting arm 19, and displacement of the arm 17 is transmitted to the connecting angle 18. In addition, a guide shaft 20 is provided in the elongated hole 18b at the other end of the connecting angle 18.
A guard panel opening/closing rod 2 that slides in the width direction of the main case 6 while being guided by a and 20b.
No. 1 knob 21a is fitted. That is, the arm 1 is inserted into the groove 15b of the cam surface 15c of the drive rack 15.
By fitting the tip 17b of the arm 17 into the groove 15b, the guard panel opening/closing road 21 slides toward the rear side of the main case 6, and the tip 17b of the arm 17 is fitted into the groove 15b.
When the guard panel opening/closing rod 21 is not fitted in, the guard panel opening/closing rod 21 slides toward the front side of the main body case 6.

Reference numeral 22 denotes a guard panel that is openable and closable at the front opening of the main body case 6 of the adapter, and shafts 22a at both ends of the guard panel 20
22b is a bearing hole 23 provided in the side plate of the main body case 6.
a, 23b and is rotatably supported. Of the bearing holes 23a and 23b that rotatably support the shafts 22a and 22b of the guard panel 22, the bearing hole 23a is a long hole.
The second shaft 22a is movable within the bearing hole 23a in a direction in which the guard panel 22 protrudes toward the front side. Further, the other end of a spring 25 whose one end is locked to the protrusion 24 of the main body case 6 is locked to the shaft 20a of this guard panel 20. It is attracted to the inside of 6. Further, the tip of the guard panel opening/closing rod 21 is in contact with the shaft 22a of the guard panel 22.

Reference numeral 26 denotes a take-up side lock member rotatably supported by a shaft 27, and this lock member 26 has two lock pawls 25a and 26b that are rotatable separately and independently around the shaft 27. The two locking claws 26a and 26b have a
Notch groove 28a of lock portion 28 of main body case 6
Accordingly, the guide roller 1 on the take-up side
Notch grooves 29a and 29b are provided to sandwich the upper and lower portions of the shaft 10a of the 0. This locking member 26 consists of a spring 2 whose one end is locked to a protrusion 30.
6c, the locking member 28 of the main body case 6
It is constantly biased in the direction away from the At the rear ends of the lock claws 26a and 26b of the lock member 26, there are provided projections 21 of the guard panel opening/closing rod 21.
b are engaged through the leaf spring 31, and when the guard panel opening/closing rod 21 slides toward the rear side of the main case 6, the lock claws 26a, 26b are engaged.
The rear end is pushed by the protrusion 21b, whereby the lock claws 26a, 26b rotate around the shaft 27, and the guide roller 1 is rotated together with the lock portion 28.
0 shaft 10a is clamped. Further, the return to the original position is performed by the spring 26c.

32 is a locking member on the supply side, and this locking member 32 is composed of two locking claws 34a, 34b that can be rotated separately around shafts 33a, 33b.
are provided with cutout grooves 36a and 36b which sandwich the upper and lower portions of the shaft 12a of the guide roller 12 on the supply side by the cutout groove 35a of the locking member 35 of the main body case 6. The lock claws 34a, 34b are constantly urged by a spring 37 in a direction away from the lock portion 35 of the main body case 6. The tip of a slide arm 39 that is guided by a guide plate 38 and slides in the width direction of the main body case 6 is in contact with the rear end of the lock claws 34a, 34b. By pushing the rear end of 34b, the lock pawls 34a, 34b lock onto the shaft 33.
a, 33b, and clamps the shaft 12a of the guide roller 12 together with the lock portion 35.

Further, a leaf spring 40 is attached to the rear end of the slide arm 39, and a cam plate 41 rotatably attached to the shaft 13a of the connecting arm 13 is in contact with the leaf spring 40. This cam plate 4
1 is an operating arm 1 provided on the drive rack 15;
5d is in contact with the operating arm 1.
5d to rotate the cam plate 41, the slide arm 39 is pushed by the cam plate 41 via the leaf spring 40, and the slide arm 39 slides toward the front side of the main case 6.

42 is a planetary gear device, and this planetary gear device 4
2 are shafts 44a, 4 attached to the gear frame 43;
4b, gears 45 and 46 that mesh with each other are rotatably supported and arranged.
A ratchet gear 47 is rotatably supported on the shaft 44a and meshes with a gear 16b that rotates around the shaft 16a together with the pinion gear 16.
, only rotation in one direction is transmitted. Further, a gear 48 coupled to the gear 46 via a friction transmission member such as felt is rotatably supported on the shaft 44b, and the gear 48 is connected only when the torque is below a certain level. Rotation of gear 46 is transmitted. Furthermore, the planetary gear system 42 has a shaft 44
By pushing the gear frame 43 and the protruding piece 43a with the connecting angle 18 and rotating the planetary gear device 42 around the shaft 44a, the gear 48 can be rotated as one gear of the reel gear 7. mesh with. This planetary gear device 42 rotates the reel gear 7 during the tape storage operation and winds the drawn-out magnetic tape 3 onto the reel 5.

In such a configuration, when the drive rack 15 starts to move rightward from the state shown in FIG. Because of the position, the take-up side drawer arm 9
does not rotate.

On the other hand, since the tip of the arm 17 is located in the groove 15b of the cam surface 15c of the drive rack 15, the arm 17 rotates the connecting angle 18.
As a result, the guard panel opening/closing rod 21 slides toward the front side of the main body case 6, and the guard panel 2
2, the guard panel 22 resists the tensile force of the spring 25 and rotates around 22b to open. At this time, the connecting angle 18 pushes the protrusion 43a of the gear frame 43 of the planetary gear device 42, so the gear 48 of the planetary gear device 42 meshes with the reel gear 7.

Also, at this time, the guard panel opening/closing rod 21 slides toward the front side of the main body case 6, and
Operating arm 15d of drive rack 15 and cam plate 41
The guard panel opening/closing rod 21 and the slide arm 39 are disengaged from each other and the slide arm 39 slides toward the rear side of the main body case 6.
The biasing of the locking members 26, 32 by
The locked state of the guide rollers 10 and 12 will be released.

Then, when the drive rack 15 further moves to the right and the knob 9b of the take-up side pull-out arm 9 comes to the part inclined with respect to the moving direction of the cam groove 15a, the take-up side pull-out arm 9 rotates inward. do. As a result, the connecting arm 14 engaged with the knob 9b also rotates around the shaft 14a, and the connecting arm 13 connected to the connecting arm 14 also rotates around the shaft 13a. As a result, the supply side pull-out arm 11 rotates inward about the shaft 11a.

By rotating the reel 5 by the reel gear 7 when the take-up side draw-out arm 9 and the supply-side draw-out arm 11 rotate inward in this way, the take-up side draw-out arm 9 and the supply-side draw-out arm 11 rotate the reel 5 in half. Case 2
The magnetic tape 3 that had been pulled out of the case is now housed inside the half case 2. As shown in FIG. 2, by housing the magnetic tape 3 in the half case 2, the second tape cut 1 can be taken out from inside the adapter.

Furthermore, when pulling out the tape, by moving the drive rack 15 to the left from the state shown in FIG. withdrawal operation, locking members 26, 32
Shafts 10a, 12 of guide rollers 10, 12 by
The clamping operation a and the closing operation of the guard panel 22 can be performed as a series of operations.

In addition, in this embodiment, two
By holding the shafts 10a, 12a of the guide rollers 10, 12 between the locking members 26, 32 consisting of individual locking claws 26a, 26b, 34a, 34b and the locking portions 28, 35 provided on the main body case 6, The guide rollers 10, 12 are fixed at the tape guide position of the first tape cassette, and the upper and lower parts of the guide rollers 10, 12 on the shafts 10a, 12a are held separately and independently, so that the main body case 6 lock part 28, 3
5 with high dimensional accuracy, even if the guide rollers 10, 12 and the lock members 26, 32 are tilted, the tilt of the guide rollers 10, 12 and the lock members 26, 32 is absorbed, and the guide roller 1
0 and 12 can be securely fixed without wobbling.

As described above, according to the present invention, the guide roller can be reliably pressed and fixed to the groove of the lock part by the lock member, so that the guide roller can be fixed at the tape guide position of the first tape cassette without tilting. It can be fixed and the magnetic tape can always be stably supplied from the cassette adapter to external equipment.

[Brief explanation of drawings]

FIG. 1 is a plan view of a cassette adapter according to an embodiment of the present invention showing the state when the tape is pulled out, FIG. 2 is a plan view showing the state of the cassette adapter when the tape is stored, and FIGS. Each figure is a perspective view showing the main structure of the cassette adapter. 1... Second tape cassette, 2... Half case, 3... Magnetic tape, 4, 5... Reel, 6
... Main body case, 7 ... Reel gear, 8 ... Idler gear, 9 ... Take-up side drawer arm, 1
0, 12... Guide roller, 10a, 12a...
Shaft, 11... Supply side drawer arm, 13, 14
...Connection arm, 15...Drive rack, 26,3
2...Lock member, 26a, 26b, 34a, 3
4b...Lock claw, 28, 35...Lock part.

Claims (1)

[Claims] 1 A second tape cassette 1 having a shorter inter-reel distance than the first tape cassette is stored, and
a main body case 6 having the same dimensions as the tape cassette;
A pull-out operation for pulling out the magnetic tape 3 from the second tape cassette 1 to the tape guide position of the first tape cassette and a housing operation for storing the magnetic tape 3 in the second tape cassette 1 are arranged in the main body case 6. Tape drawer storage means 9, 1 for performing
1, and a guide roller 1 provided in the tape drawer storage means for guiding the running of the magnetic tape 3.
0 and 12 at the tape guide position of the first tape cassette; a driving means 15 for pulling out the magnetic tape 3 to a tape guide position of one tape cassette and driving the locking means to fix the guide rollers 10 and 12 by displacement from the second position to the third position; The lock means includes lock parts 28 and 35 which are fixed in the main body case 6 and have groove parts 28a and 35a of the same shape on the upper and lower sides, and the guide roller 10 and
A cassette adapter comprising locking members 26 and 32 that press and clamp the upper and lower parts of twelve shafts 10a and 12a.