JPS6137695B2 - - 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,
10 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 normally 120 minutes long, it will last about 20 to 30 minutes, but since it is a small cassette, a small system can be created by providing 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, but the take-up reel side will be connected to the take-up reel 9 of the small cassette via the idler 13. An adapter is required to transmit the drive force of the take-up reel 2 of the temporary set 1. The tape 12 also needs to be drawn 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 this point, and is configured such that a second cassette having a smaller distance between reels can be built into the first cassette, and a take-up reel of a deck for the first cassette can be installed. a pair of tape pull-out members having a mechanism that engages with a drive shaft to drive a take-up reel of the second cassette and pulls out the tape from inside the second cassette; and an operating lever that drives the tape pull-out members. A lid that covers this operating lever, a guard panel that is attached to the front surface so that it can be opened and closed and is always biased by a spring in a direction that closes the front surface, and a tip of the guard panel that comes into contact with the opening/closing lever that opens and closes the guard panel, and the lid and a member that operates the opening/closing lever in conjunction with the opening/closing lever, and the guard panel is opened by opening the lid when operating the operating lever.

The following drawings (Fig. 2,
The explanation will be based on Fig. 3). In the figure, 21 is the adapter body, which is the same size as a normal cassette;
2 and 23 indicate the positions of the tape guides of a normal tape cassette, 24 and 25 are tape pull-out arms, 26 is an interlocking arm, 27 is an operating lever, and 28
is an idler arm, 28' is a connecting arm, 29 is an idler gear, 30 is a take-up gear wheel, 31 is a small cassette main body, 32, 33 are tape guides, 34 is a supply reel, 35 is a take-up reel, 3
6 is a tape, 37 is a lid covering the operating lever 27, 3
8 is a connecting rod, 39 is a connecting arm, 40 is a connecting rod,
41 is a guard panel on the front side of the adapter, and 42 is a guard panel opening/closing lever. The adapter is made to have exactly the same external size as a normal tape cassette, and can accommodate a small cassette that uses the same tape as the normal cassette and has a reel-to-reel distance of approximately 1/2 that of a normal cassette. The center portion 34a of the supply reel 34 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 34 is normally engaged with the reel shaft of the deck for the cassette. Take A's Prill 35
has teeth 35b around its flange,
The shaft provided in the small cassette is rotated about the center portion 35a. The idler arm 28 supports an idler gear 29 having teeth in two stages, and connects the take-up gear wheel 30 and the idler gear 2 with the connecting arm 28'.
9 are connected at a certain distance. The take-up gear wheel 30 is normally located at the take-up reel position of the cassette.
The take-up reel 35 is normally engaged with the reel shaft of a cassette deck, and the take-up reel 35 is driven by the take-up gear wheel 30. The tape 36 forms a tape running path at the tape guide positions 32, 33 of the small cassette, and can be pulled out by the tape pull-out arms 24, 25 to the tape guide positions 22, 23 of the normal cassette. 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. The knob 24c of the arm 24 is engaged with the drive groove 27b of the operating lever 27, and when the operating lever 27 is slid in the direction of the arrow 43 in FIG. The tape 36 is pulled out to the tape guide position 22 as shown. 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 the tape 36 is moved to the tape guide position 2 through the interlocking arm 26.
You can withdraw up to 3. Incidentally, the interlocking arm 26 rotates around the fulcrum 26a, and the knob 26b engages with the drive groove 27c of the operating lever 27, as indicated by the arrow 43 in FIG.
When the operating lever 27 is slid in the direction, the tape 36 can be pulled out as shown by the two-dot chain line. However, at this time, when the tape pull-out arm 24 rotates around the fulcrum 24b, this arm 2
4 and the tape 36 may come into contact with the guard panel 41. Therefore, it is necessary to open the guard panel 41 at this time. For this purpose, a lid 37 that covers the operating lever 27 and a member that connects the lid 37 and the guard panel 41 are provided. Lid 3
7 rotates around the shaft 37a, and connects the connecting rod 38,
a connecting arm 39 that rotates around a shaft 39a;
The connecting rod 40 transmits the opening/closing operation of the lid 37 to the guard panel opening/closing lever 42 . Guard panel 4
1 opens and closes using shafts 41a and 41b at both ends as fulcrums, and therefore opens and closes when the opening/closing lever 42 is driven.
To explain this movement in more detail based on FIG. 3, the opening/closing lever 42 is always urged in the direction of the arrow 45 by the spring 44, that is, the guard panel 41 is always urged in the direction of being closed. When the lid 37 is closed in the direction of arrow 46, the guard panel 41 is closed because it is linked with the opening/closing lever 42, but when the lid 37 is opened in the direction of arrow 47, this movement causes the connecting arm 39 to close. is arrow 4
8 and pushes the guard panel 41 open in the direction of arrow 49. Since the operating lever 27 is located inside the lid 37, it cannot be operated without opening the lid 37. Therefore, since the operating lever 27 cannot be moved when the guard panel 41 is closed, the tape 36 will not be accidentally pulled out and the tape 36 will be damaged. The guard panel 41 is always in an open state.

As described above, in the present invention, a cover is provided for the operating lever for tape drawer, and the opening/closing of the cover is linked with the opening/closing of the guard panel. The panel is always open and therefore does not damage the tape, ensuring safety when pulling out the tape (and during reverse operation). This makes the system easily possible. In addition, in the case of the present invention, the tip of the member interlocking with the lid is only in contact with the opening/closing lever of the guard panel and is not connected, so the member interlocking with the lid only moves in the horizontal direction. The space required for arranging the members can be reduced, and the adapter can be designed easily.

[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 embodiment of the present invention, and FIG. 3 is a perspective view of the main parts. 21...Adapter body, 24, 25...Tape drawer arm, 26...Interlocking arm, 27...Operation lever, 28...Idler arm, 28'...
Connection arm, 29... Idler gear, 30... Winding gear wheel, 31... Small cassette body, 32, 3
3... Tape guide, 34... Supply reel,
35...Take a reel, 36...Tape,
37... Lid, 38... Connecting rod, 39... Connecting arm, 40... Connecting rod, 41... Guard panel, 4
2...guard panel opening/closing lever, 44...spring.

Claims (1)

[Claims] 1. A second cassette having a smaller distance between reels than the first cassette can be built in, and engages with the take-up reel drive shaft of the deck for the first cassette to take up the second cassette. A pair of tape drawer members having a mechanism for driving the reel and pulling out the tape from inside the second cassette, a control lever for driving the tape drawer members, a lid covering the control lever, and a lid that can be opened and closed on the front side. It has a guard panel attached and always biased by a spring in the direction of closing the front surface, and a member whose tip abuts an opening/closing lever that opens and closes the guard panel and operates the opening/closing lever in conjunction with the lid. . A tape cassette adapter in which the guard panel is opened by opening the cover when operating the operating lever.