JPS6137694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette adapter, which allows a cassette with a smaller external shape and a narrower distance between reels than an ordinary tape cassette to be adapted to the deck of an ordinary tape cassette. The purpose is to

Figure 1 shows a normal VHS video cassette and a small cassette. 1 is a VHS video cassette, 2 is a take-up reel, 3 is a supply reel, 4 and 5 are tape guides, and 6 is whether or not there is a tape. The detection mechanism 7 is a tape. Also, 8 is a small cassette, 9 is a take-up reel, 1
0 and 11 are tape guides, and 12 is a tape.
Compared to the size of the normal video cassette 1, the small cassette 8 has a narrower distance between the reels, between reels 2 and 3 and between reels 3 and 9, and of course the tape length is also shorter, with the maximum length of a normal cassette being 120 minutes. If it is long
It takes about 20 to 30 minutes, but since it is a small cassette, a small system can be created by installing a dedicated small deck. If the small cassette 8 is installed on the deck of the normal cassette 1, the distance between the reels will naturally be different, and the supply reel 3 will be in the same position.
On the take-up reel side, an adapter is required to transmit the drive force between the take-up reel 9 of the small cassette and the take-up reel 2 of the normal cassette 1 via the idler 13. The tape 12 must also be pulled out from the small cassette so that the tape guide positions are moved as shown by arrows 14 and 15, respectively.

The present invention has been made in view of the above, and has a structure in which a reel is fitted into a shaft provided in a second cassette having a smaller distance between the reels than the first cassette, and teeth are formed around the flange. The take-up reel is configured to be driven by a take-up gear wheel that engages with the reel drive shaft of the deck for the first cassette via an idler gear that meshes with the teeth of the take-up reel, and a pair of tape drawer members for drawing out the tape from the tape drawer, an operating lever for driving the drawer members, a tip end of which can be engaged with a lock hole provided in the second cassette, and the other end rotatably pivoted. and a lock arm which is always urged by a spring in a direction to be removed from the lock hole and which is in contact with a knob provided on the operating lever, and when the tape is pulled out by operating the operating lever, the lock arm is inserted into the lock hole of the second cassette. The second cassette is fixed by engaging with the second cassette.

The following drawings (Figs. 2 to 2) show an example of carrying out the present invention.
The explanation will be based on FIG. 4). In the figure, 21 is an adapter body of the same size as a normal tape cassette, 22 and 23 indicate the tape guide positions of a normal tape cassette, 24 and 25 are tape pull-out arms, 26 is an interlocking arm, 27 is an operating lever, 28 is an idler arm, 28' is a connecting arm, 29 is an idler gear, 30 is a winding gear wheel, 3
1 is a gear release lever, 32 is a small cassette main body, 33 and 34 are tape guides, 35 is a supply reel, 36 is a take-up reel, 37 is a tape, and 38 and 39 are guides for positioning the small cassette.

The adapter main body 21 is made to have exactly the same external shape as a normal cassette, and can accommodate a small cassette having the same tape width as the normal cassette and the distance between the reels being approximately 1/2 that of the normal cassette. The center portion 35a of the supply reel 35 of the small cassette is located at the same position as the center of the supply reel of the normal cassette, and the supply reel 35 is normally engaged with the reel shaft of the deck for the cassette. The take-up reel 36 has teeth 36b around its flange and rotates about a center portion 36a on a shaft provided in the small cassette. The idler arm 28 can rotate about a shaft 28a, and an idler gear 29 with two stages of teeth is connected to the shaft 28a.
A connecting arm 28' is attached that supports the winding gear wheel 30 and the idler gear 29 at a fixed distance. The shaft 30a of the winding gear wheel 30 is located at the tip of the connecting arm 28'. The idler gear 29 can be engaged with and disengaged from the take-up reel 36 by movement of the idler arm 28. The take-up gear wheel 30 is normally located at the take-up reel position of the cassette, and is usually engaged with a reel shaft of a deck for the cassette. The tape 37 forms a tape running path at the tape guides 33 and 34 of the small cassette, but the tape drawer arms 24 and 2
5 indicates the tape guide position 2 of the normal cassette.
You can withdraw up to 2.23. The tape pull-out arm 24 can rotate about a fulcrum 24b, and a tape guide 24a is provided at the tip of the arm 24. Also this arm 2
The knob 24c of No. 4 is the drive groove 27b of the operating lever 27.
When the operating lever 27 is moved in the direction of arrow 40 in FIG. 2, the tape 37 is pulled out to the tape guide position 22. Similarly, the tape pull-out arm 25 can rotate around a fulcrum 25b, and a tape guide 25a is provided at the tip of this arm 25, and an interlocking arm 26 moves the tape 37 to the tape guide position 25. It can be withdrawn up to. The interlocking arm 26 rotates around the fulcrum 26a, and the knob 26b is connected to the operating lever 27.
The tape pull-out arm 25 is driven by movement of the operating lever 27 in the direction of arrow 40 in FIG. The interlocking arm 26 and the tape pull-out arm 25 are connected by fitting a pin 25c of the tape pull-out arm 25 into a long hole 26c of the interlocking arm 26. The operating lever 27 is the knob 2
7a can be operated manually. The gear release lever 31 rotates around a fulcrum 31a, and when its tip contacts the take-up gear wheel 30 and the operating lever 27 moves in the direction of arrow 41 in FIG. 2, the knob 27d pushes the gear release lever 31. So,
This movement causes the winding gear wheel 30 to move as indicated by the arrow 4 in FIG.
Move in direction 2. This causes the idler gear 29 to be separated from the teeth 36c of the take-up reel 36. FIG. 2 shows the state in which the small cassette can be attached and detached. By the way, FIG. 3 shows a state in which the operating lever 27 is operated and the tape 37 is pulled out to the tape position of the normal cassette. In this FIG. 3, the idler arm 28 is moved by a spring (not shown) to
Since the gear release lever 31 is also biased in the direction of the arrow 44 by a spring (not shown), when the tape is pulled out using the operation lever 27, the knob 27d is biased toward the gear release lever. 31, thereby causing the idler gear 29 to mesh with the take-up reel 36. In this state, the adapter can be attached to a normal cassette deck, and since the take-up gear wheel 30 normally engages with the drive shaft of the cassette take-up reel, when the take-up gear wheel 30 is driven, the take-up The tape is wound in conjunction with the up reel 36.

By the way, if the tape 37 is pulled out into the adapter and the small cassette is not locked, there is a risk that the small cassette will come off with the tape 37 pulled out, and the tape 37 will be damaged. Therefore, the present invention has taken this point into consideration, and is designed so that the movement of the operating lever 27 causes the locking of the small cassette to be performed at the same time as the operation of drawing out the tape.A specific example of this is shown in FIG. ing. In the figure, 45 is a lock arm, 46
47 is a lock arm support base, and 48 is a lock knob. The tip of the lock arm 45 can fit into the lock hole 32a provided in the small cassette main body 32. 45a is lock arm 45
This is a shaft whose other end is rotatably supported by the support base 47. Normally, the lock arm 45 is urged in the direction of arrow 49 by the spring 46 and is separated from the lock hole 32a, but when the operating lever 27 moves in the direction of arrow 40, the knob 4 provided on the operating lever 27 moves away from the lock hole 32a.
8 pushes the lock arm 45 into the lock hole 32a, the small cassette is moved to the positioning guides 38, 39.
Since it is restricted from front to back and from side to side, it cannot escape upwards. This prevents the small cassette from accidentally coming off, and prevents the cassette from coming off while the tape 37 is being pulled out.Moreover, this operation is carried out at the same time as the tape is pulled out, which is very convenient.

As described above, according to the tape cassette adapter of the present invention, it is possible to safely handle tape, which must be handled with great care for the cassette, especially when the tape is being pulled out, and moreover, the cassette can be locked at the same time as the tape is being pulled out. The mechanism is very practical and allows small cassette and adapter systems to be easily made possible. Further, in the case of the present invention, the lock arm is engaged with the lock hole of the second cassette by pushing the lock arm with the knob of the operating lever,
Because it is only necessary to move the control lever in a straight line, the space required for the control lever can be kept to a minimum.Moreover, by simply changing the position of the control lever's knob, you can move the control lever and move the second cassette. The effect is that the timing relationship with the fixation can be freely changed.

[Brief explanation of the drawing]

Fig. 1 is a comparative view of the external appearance of a normal cassette and a small cassette, Fig. 2 is a schematic plan view showing an example of the implementation of the present invention, Fig. 3 is an explanatory view of the same operation, and Fig. 4 is a perspective view showing the main parts. It is a diagram. 21...Adapter body, 24, 25...Tape drawer arm, 24a, 25a...Tape guide, 24c...Knob, 26...Interlocking arm, 26
b...knob, 27...operation lever, 27b, 27
c... Drive groove, 27d... Knob, 28... Idler arm, 28'... Connection arm, 29... Idler gear, 30... Winding gear wheel, 31... Gear release lever, 32... Small cassette body , 32
a... Lock hole, 33, 34... Tape guide,
35...Supply reel, 36...Take-up reel, 36b...Teeth, 37...Tape, 38,
39...Guide, 45...Lock arm, 46...
...Spring, 47... Lock arm support, 48...
Rock knob.

Claims (1)

[Claims] 1. A take-up reel that fits into the shaft provided in the second cassette, which has a smaller distance between the reels than the first cassette, and has teeth formed around the flange, and an idler gear that meshes with the teeth of the take-up reel. a pair of tape pull-out members configured to be driven by a take-up gear wheel that engages with a reel drive shaft of a deck for the first cassette through the tape pull-out members; a driving operating lever, the tip of which is engageable with a lock hole provided in the second cassette, the other end of which is pivotably supported, and is constantly biased by a spring in a direction away from the lock hole; It has a lock arm that is in contact with a knob provided on the operating lever, and when the tape is pulled out by operating the operating lever, the lock arm is engaged with the lock hole of the second cassette to fix the second cassette. Tape cassette adapter.