JPS6114592B2 - - 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 a normal video cassette 1, the distance between the reels of the small cassette 8 is narrower than that between the reels 2 and 3 and between the reels 3 and 9. Naturally, the length of the tape will also be shorter, and if the longest cassette is usually 120 minutes long, then
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 pull-out members for pulling out the tape from the tape, an operating lever for driving the pull-out members, and a member for interlocking and disengaging the idler gear with the teeth of the take-up reel of the second cassette in conjunction with the operating lever. By operating the operation lever, the idler gear is released when the second cassette is inserted, and the idler gear engages with the take-up reel when the tape is pulled out.

The following drawings (Fig. 2,
The explanation will be based on Fig. 3). In the figure, 21 is the 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 exercise 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, and 37 is a tape.

The adapter main body 21 is made to have exactly the same external shape as a normal cassette, and can house a small cassette with the same tape width as a normal cassette and a reel distance approximately 1/2 that of a 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.
It has a central portion 36a and rotates around 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 attached to the shaft 28a.
A connecting arm 28' is attached which is supported by 8b and which engages the winding gear wheel 30 and the idler gear 29 and connects them at a constant distance. The shaft 30a of the winding gear wheel 30 is located at the tip of the connecting arm 28'. The idler gear 29 is activated by the take-up reel 36 by the movement of the idler arm 28.
It can engage or disengage. 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 arm 24,
25 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 38 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 38 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 39 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 it in the direction of 0. This causes the idler gear 29 to be separated from the teeth 36b 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 42 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 the take-up gear wheel 30 engages with the drive shaft of the normal cassette take-up reel, so when the take-up gear wheel 30 is driven, The tape is wound in conjunction with the take-up reel 36. In this way, before the tape is pulled out, the idler gear 29 is released, so the teeth 36 of the take-up reel 36
b does not ride on the teeth of the idler gear 29, and since the idler gear 29 engages at the same time as the tape is pulled out, it is not only easy to attach and detach a small cassette, but it is also carried out in conjunction with the movement of the operating lever 27, making it very easy. It has become a simple movement.

As described above, according to the tape cassette adapter of the present invention, the idler gear can be attached and detached and the tape can be pulled out with a single touch using the tape drawer operation lever, making it very practical and a system for small cassettes and adapters. This makes it easily possible.

[Brief explanation of the drawing]

FIG. 1 is a comparative view of the external shapes of a normal cassette and a small cassette, FIG. 2 is a plan view showing an example of the implementation of the present invention, and FIG. 3 is an explanatory view of the same operation. 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 ,3
3, 34...tape guide, 35...supply reel, 36...take-up reel, 36b...
Teeth, 37...tape.

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; It has an operating lever to be driven, and a member that engages and disengages the idler gear with the teeth of the take-up reel of the second cassette in conjunction with the operating lever. A tape cassette adapter in which the idler gear is released when the cassette is inserted, and the idler gear engages with the take-up reel when the tape is pulled out.